This Podcast Will Kill You - Ep 173 Childhood Vaccine Schedule 2: Who’s making the call?

Episode Date: April 15, 2025

After last week’s episode, we all know about each of the diseases that we’re protected against thanks to our childhood vaccine schedule here in the US. And after this week’s episode, we’ll understand more about the schedule itself - why it might look different from other schedules around the world, how it gets made, and who makes the recommendations. We’ll also review some of the current outbreaks of vaccine-preventable diseases before leaving you with some of our thoughts on how to talk about vaccines and vaccine hesitancy.Updates:At the time of recording, the ACIP meeting originally scheduled in Feb 2025 had not been rescheduled. It is now rescheduled for April 15-16 and the agenda is posted here: https://www.cdc.gov/acip/meetings/index.htmlAdditionally, the case numbers of current measles outbreaks in the US have grown substantially since the time of our recording. Updated case numbers are reported every Friday here: https://www.cdc.gov/measles/data-research/index.html and at the time of episode release there have been 712 cases reported in the US and 3 deaths. Support this podcast by shopping our latest sponsor deals and promotions at this link: https://bit.ly/3WwtIAuSee omnystudio.com/listener for privacy information.

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Today, I'm watching for humpback whales. Anyway, wish you were here. Award-winning Kid-Free Alaskan cruises from Virgin Voyages with immersive shore excursions and zero kid energy. Virgin Voyages.com. I am one of the increasingly rare old-timers who lived during the pre-vaccination era. I am the second to the last of 13 siblings, five of whom died of vaccine-preventable diseases in infancy. Born to poor immigrant parents, I remember well my mother's account of the causes of their deaths. three from pertussis and two from measles.

Even after many years had passed, she spoke of the death of her angels with a great deal of emotion. Imagine losing not one, two, three, or four, but five babies. It was common in the pre-vaccine era. Like our family,

many families lost several children to these diseases. We forget. Time blurs our memories of these common tragedies of yesteryear. I remember well during the winter and spring of each year hearing the whoop of pertussis in movie theaters, school assemblies, and assorted gatherings. Today, few have ever heard this, and those who have forget. I remember the summer outbreaks of polio, the crippled children who could no longer walk or walked with limb distorted limbs. As a third and fourth year medical student, I remember answering the appeals of hospital administrators who could not find the nursing staff for special duty.

tending to the needs of polio patients in iron lungs. We forget. I remember the awful cases of measles my own children experienced. I remember the children with smallpox during the years my family lived in Pakistan. I remember those who lost their sight from lesions in their eyes. I remember those who died. We forget. It's just such an incredibly powerful letter.

Yes. This is, I mean, this is the second time. that we have included this firsthand account. The first time was in one of our vaccines episodes back in 2018. Yeah. And it has stuck with me so much. Same.

Same. Because it is such a powerful personal story of what we have gained and what we stand to loose. Right, exactly. This was a letter from E.J. Gene Gangerosa to the Immunization Action Coalition. They were a professor emeritus from Emory University and wrote that letter all the way back in the year 2000. Yeah.

And it's still as relevant today. It is. And such just an important piece of sort of that like living memory that that we do. We forget. Yep. Yeah. And we have to, we have to remember. Yeah.

Hi, I'm Aaron Welsh. And I'm Aaron Omen Updike. And this is, this podcast will kill you. It sure is. And we're back. With the second part as promised. Yes. Yeah.

So last week, we took you through just a refresher course on vaccines, how they worked. And then we did a very quick tour through each of the diseases, the many diseases, that these vaccines protect us from. We call it quick. We called it quick. We closed out that episode with a big picture view of why vaccination is so very important, not just at the individual level, not just for yourself, for your kids, but also to protect. our communities. Vaccines are truly one of science's greatest achievements. And as our firsthand just demonstrated, there are increasingly fewer of us who know what it's like to live in a world without vaccines. And the amazing thing is that we don't have to. Right. We have these incredible

vaccines. And even better, we have highly knowledgeable, well-trained scientists who consider all the aspects of the data that we have to tell us which vaccines we should take and win. That's right, everyone. Today we're talking about the ACIP, the advisory committee on immunization practices here in the U.S. Yep. In this episode today, we're going to talk so much more about the ACIP. We're going to talk about how we came to have our childhood vaccine schedule that we do have today, what goes into making it, and where things stand with vaccine prevention.

illness around the world today. Because despite the existence of safe and effective vaccines, we are still seeing outbreaks of diseases like measles, like whooping cough, like rebella, diseases that can seriously injure or even kill those who get it. Yeah. A lot of these outbreaks are happening in regions of the world that lack access to vaccines or lack the infrastructure to deliver vaccines to everybody who needs them. And undoubtedly, we'll be seeing more and more of these outbreaks and preventable death and suffering due to the attacks and dismantling of USAID, which is a huge problem. Yeah.

But some of these outbreaks, especially in high-income countries like the U.S., are directly attributable to the rise in vaccine hesitancy and declining vaccination coverage. Vaccine hesitancy is one of the biggest threats to global health. And it's not something that's just going to go away on its own. Yeah. It needs to be directly addressed in every possible. way at every possible level. And in this regard, all of us can truly make a difference. And so we really can. And that's what we want to round out this episode with. It's just going through

some evidence-based methods. We love evidence. We love evidence-based things for having conversations with those who might be wary of vaccines. We've got a lot to go through. So should we start with quarantine time? We should. What are we drinking this week? We're still drinking boosted. We are still drinking. Getting in those booster shots. Yeah.

It is, it's delicious. It's got gin and raspberries and lemonade. And we'll post the full recipe for boosted, the quarantini, as well as our alcohol-free placebo-rita on our website, this podcast will kill you.com, as well as on all of our social media channels. So make sure you're following us. Make sure you are. And on our website, this podcast, woggily.com, you can find just so many incredible things that you'd love to find. We've got merch. We've got transcripts from all of our episodes.

We've got a link to a Goodreads account and a bookshop.org affiliate account. We've got our music from Bloodmobile. We've got sources for evidence from all of our episodes, including this one. So many sources. We've got a contact us form. We've got a firsthand account form if you'd like to submit your firsthand account. It's just so much there. There's a lot.

There really is. And if you haven't already, we would love to encourage you to rate review and subscribe so that you don't miss any of our things. And because it does really help us when other people can find our work. We like making this podcast for you. We appreciate it. Are we ready? I think so. Should we take a quick break and then Aaron walk us through?

The history of the ACP. I'm really excited to learn about this. Oh, I really had a really fun time digging into the details. So yeah, let's just take a quick break so we can get right to it. Okay. Dinner shows up every night, whether you're prepared for it or not. And with Blue Apron, you won't need to panic order takeout again. Blue Apron meals are designed by chefs and arrive with pre-portioned ingredients so there's no meal planning and no extra grocery trip. There, assemble and bake meals take about five minutes of hands-on prep. Just, spread the pre-chopped ingredients on a sheet pan, put it in the oven, and that's it. And if there's truly no time to cook, dish by Blue Apron meals are fully prepared. Just heat them in the oven or

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Such a good question. Right? Vaccine schedules are different in different countries. And they take into account things like how prevalent a certain disease is and how much of a threat it poses. And so that explains why some of high-risk countries use the BCG vaccine for tuberculosis, for instance, and others might not use that vaccine or include it in routine immunizations. Right.

In the U.S., the federal body that makes decisions about which vaccines to recommend at what ages and how many doses is the advisory committee on immunization practices, the ACIP. This committee is made of up to 19 voting members who vote on vaccine recommendations, and they include independent medical and public health experts who do not work at the CDC, as well as one consumer representative. This is a volunteer position, and members serve staggered four-year terms. Prospective members have to apply, and then they have to undergo the screening process, and that includes things like disclosing conflicts of interest,

and this is like routinely done and maintained. That's fairly important. Ultimately, they are selected by the Secretary of Health and Human Services, who at the time of recording is, RFK Jr., who, as probably most people are aware, has a long and vocal history promoting anti-vaccine propaganda, including during a measles outbreak in Samoa that led to the deaths of 83 children, mostly under the age of five. Yep.

And they, he ultimately is going to be choosing who sits on ACIP. Yeah. And so I will say that like there are, there are a certain number of. people right now whose terms will be up. And so it might not be, I mean, unless ACIP gets completely dismantled, who knows? That's a whole other can of wararms, Aaron. There are a lot of questions as to like, how much damage can someone do? Right. Who has malintent. I would hope that there are stopgaps in place, but tell me more, Aaron. Yes, yes. Okay. So the ACIP charter, which allows for its continued functioning, has to be renewed and approved every two years by the Department of Health and Human Services.

Okay. Okay. Currently, there are 15 members, active members, on this committee, with four whose terms are up in 2025. Okay. Okay. So in theory, in 2025, he could replace four people. Okay. There are other non-voting members of this committee who represent other federal institutions, such as the Centers for Medicare and Medicaid Services and the Indian Health Service. Okay. As well as organizations like the American Academy of Pediatrics and the National Foundation for Infectious Diseases.

and many others. Yeah. ACIP meets three times a year, three times a year. Three times a year. Yeah. To review. More than I anticipated. I know.

It is, it's a lot. They're constantly reviewing data and voting on recommendations. Like this is a con, because things happen, things have moved very quickly in medicine. Yeah. Well, quick and slow at the same time. Exactly. Yeah. But like to keep up to date, this is not just like, oh, let's, you know, dust off the piles

of data. It's like constant vigilance. Okay. Awesome. Yeah. So there was a meeting scheduled for February 26 to 28th of this year and it was postponed. Okay. And there has been, as of the time of recording, no updated meeting date. And maybe it will get rescheduled. Maybe it won't. Okay. But you should know that if it does get rescheduled and if any one of the subsequent meetings do take place, that I want everyone to know that there are opportunities, at least at this point in time, to submit public comments. Okay. Like we'll, we can do that. We can, yes. Okay. We'll link to the page that has more info on this, but in the past, the public was able to submit a written comment and request to make an oral public comment during the meeting. So there are written comments that you can make, and you could

also request to make an oral comment during the meeting itself. Awesome. Love that. So this is an opportunity for all of us to demonstrate how much vaccines mean to us. Right. Writing it to say. Our safety, our freedom. We love them. Thank you. We love them.

Please don't take them away. Yep. If the February meeting does not get rescheduled, there will be another one, maybe, I guess, June 26th, June 25th to 26. Okay. Okay. So what is the ACIP looking for precisely during these meetings? Right. What do they do?

Right. So broadly speaking, they consider, quote, disease epidemiology and burden of disease. vaccine efficacy and effectiveness, vaccine safety, economic analyses, and implementation issues. Okay. So a whole lot of different things. Yeah. Like all of the different facets that you could think of when it comes to vaccines. The disease itself, how good the vaccines works, the economics of it all, makes sense.

Yeah. Yeah. And so this is what they are looking at. These are the types of questions that they're looking at. Now, what are they voting on? Right. So they are voting on. They vote on final recommendations, right?

At the end of this are recommendations. And they include, quote, the number of doses of each vaccine, timing between each dose, the age when infants and children should receive the vaccine, and precautions and contraindications. So who should not receive the vaccine. Okay. That's what they vote on. And these are just recommendations. Recommendations. It is then the CDC who has to decide whether or not they adopt the recommendations from ACIP, right?

Right. And then there's also like the American Academy of People. Pediatrics also decides what to incorporate. It's like there are a lot of, the thing is, this is a constant conversation. Right. That is going on. And there is one shared goal, which is to how to best ensure the health of the public. The public.

That is the goal. Public health. How about that? That's the goal. So the ACIP is not a new committee. It was first organized in 1964. And at the time of its first meeting, the only organization that was. was making recommendations on vaccines in the U.S. was the American Academy of Pediatrics

Committee on Infectious Diseases. And their recommendations were included in a publication called The Red Book, which you, I know you have heard of, and many people out there may have heard of. And it still exists today. It's a really important resource for physicians as well as the ACIP. Like these recommendations that are included in the Red Book are also considered by the ACIP. Okay. At the time of the first Red Book, which was 1938, the included recommendations were fairly limited. Part of the reason for this was because there were far fewer vaccines available than there are today. So the only ones that they officially recommended in terms of the timing for when a child should receive them were smallpox,

of course, before it was eradicated, diphtheria, tetanus, pertussis, also known as whooping cough, typhoid fever, varicella, and tuberculosis. Okay. So, I mean, compare that to what we went through yesterday. We have a lot more. And so, so many more. I just, we don't, we don't include typhoid fever regularly. Or smallpox, obviously. Or smallpox, of course, yeah. It's so interesting, too, though, that they had Veracella back then, because then we didn't have it for so long. It's just so interesting. I have so many questions. I know. And we may have even touched on that in our varicela. We probably did. But you know, I don't remember things. Same. But then the introduction of the polio vaccine in 1953, the prompted passage of the Polio Vaccination Act a couple of years later.

And then this provided funds to what was then the communicable diseases center later became known as the CDC. And this helped states buy and distribute polio vaccines. But there was still no formal process for the federal government to make recommendations for vaccines and the timing of vaccinations at a national level. Vaccines were recommended for licensing at the federal level, like by the Surgeon General, they would say, okay, yes, we recommend this for licensing for we approve. But mostly the government was focused on vaccines only as far as the military was concerned. Tracking efficacy and outbreaks and so on. So it was like that is where the data collection was, that's where the decision making was. That was the main interest. Right. That makes sense.

You're protecting assets in that case. Sorry. And I think especially the timing close to World War to. Right. And then, yeah. So there was like a lot of that, yeah, there was context for that. But then the polio vaccine was came out in 1952, 1953, and then the measles vaccine 10 years later in 1963. It was clear that there was a need for a national immunization policy. Right. Especially with two more vaccines, mumps and rubella on the horizon for the rest of the 1960s. Like they were like clearly, you know, there was momentum. It was. It was, you know, it was. Yeah, these things were going to happen. Yeah.

And so things really got started with the Vaccination Assistance Act in 1962. And this provided support for mass vaccination campaigns, especially targeting school-age children, which is where most of the spread and harm from these diseases was concentrated. And ultimately, it led to the formation of the ACIP in 1964. So, like, instead of having one meeting for measles and one meeting for polio and one meeting for this, it was like, why don't we just do them all at once? Do this all at once? Yeah.

Efficiency. How about that? I can't. I'm sorry. I was going to make like a government efficiency joke, but I... Because it's too real right now. It's too close. Yeah.

Yeah. I know. At the first meeting, the committee considered measles, influenza, Rubella, and smallpox vaccines for recommendation. I think there was still at this point a separate committee for polio. Okay. But since the beginning, the ACIP has worked closely with professional organizations like the American Academy of Pediatrics, the American Academy of Family

Physicians, the American College of obstetricians and gynaecologists, and others. Together, the ACIP and all of these organizations, both federal and professional, carefully evaluate all of the available data to make recommendations on how to best protect the health of Americans. Yeah. Again, that is the goal. That is the goal. That is the goal. So what does this look like in practice?

And I want to share a real-life example of how one of these recommendations is made and what information is considered when weighing whether or not to change a recommendation. Okay. So let's talk about measles. Seems timely. Seems timely. Yeah. Unfortunately timely. Hot topic.

So since the introduction of the first measles vaccine in 1963, researchers have developed new versions of the vaccine, each of which has been and continues to be evaluated for safety, efficacy, ease of administration, and so on. So like live versus killed, with or without certain adjuvants, in a combo shot or solo, the timing for the best immune stimulation, like all those sorts of things are considered for each of these vaccines regularly continuously. And on occasion, the ACIP has changed their recommendation for which measles vaccine to include, such as in 1968, when they changed their recommendation from the less attenuated vaccine, which was the Edmondsden B strain, to one that was based on a more attenuated strain, the Morriton vaccine. The Morriton vaccine, the more attenuated strain, was as effective as the previous

vaccine, but it produced fewer side effects. Right. So it was like an even weaker version of a measles virus compared to an older vaccine. But it protected you just as well, had fewer side effects. Well, that. Yep. They also revisited what age to give the vaccine. So initially, their recommendation was nine months of age.

and then that changed to 12 months and then 15 months. And the reason for these changes was not about safety, but more about efficacy. Because researchers had found that babies that were vaccinated earlier tended to lose immunity a bit more than if they were vaccinated later. It's probably due to maternal antibodies circulating. Or just like, you know, babies in their weird immune systems. Right, exactly. And so these are things that they look at monitoring. They were looking out for.

Yeah. Because of basic scientific research. that was going on in clinical research that's going on where people are actually like testing people who get these vaccines for their antibody response, for example, and then collecting and gathering all of that data. And connecting that to epidemiological research that was monitoring outbreaks and in what ages and what birth cohorts and all of these different, yep, all of these different things. All of this amazing research.

Yep. Yes. Yeah. Okay. Okay. But starting in 1963, the ACIP had recommended only one dose of the measles vaccine or later, a few years later when Mumps and Rubella came along MMR. Okay. They had recommended one dose.

Just one dose. And this is, of course, different from the two-shot series that we get today that we discussed last week. How did one shot become two? Outbreaks. Within the first five years of the measles vaccine. incidence of the infection had dropped to 5% of pre-vaccine levels. Within five years. Within five years.

Yeah. With this incredible success, measles elimination in North America seemed like a very achievable goal. Yeah. Yep. I mean, like first it was like a pipe dream and then it was like, oh, wait, actually. Wow. We could actually do this thing. Reasonable dream, yeah.

Okay. And even as progress toward this goal was made, a few outbreaks in the late 1970s, and into the 1980s slowed that progress. But they also provided an opportunity to ask, how was measles spreading? Right. Who was getting the infection? Was it teenagers?

Was it young kids? Had they been vaccinated before? And what the CDC found was that those who were involved in the outbreaks were often either unvaccinated children under five years old or older children, such as high school and college students who had been vaccinated, but only. only once. Okay.

Only with one dose. And that was, again, the recommendation at the time. And there had been some debate about whether to include a second dose. This was, you know, kind of brought up at different meetings. And it was this tradeoff, this weighing, well, what are we actually getting with that second dose of the vaccine? And up until this point, up until the late, well, 1980s, really, the decisions seem to fall on, well, one dose is probably enough.

One dose protects you. like I think you said, Aaron, last week, 93%. Yeah. Do we really need that extra, four to five percent? Yeah. Turns out what these outbreaks showed us is that, yes, we do. Yeah. Especially when having that extra four to five percent protects those who are vulnerable,

who cannot be vaccinated. Right. And so there was an outbreak in 1989 that led to a 20 percent hospitalization rate, which is what we pretty common. have seen, see up, seen today, and 100 deaths. Wow. And this really demonstrated that waning immunity or under vaccination could have dire consequences for those who are too young to be vaccinated.

So in 1989, both the ACIP and the AAP, the American Academy of Pediatrics, changed their recommendation to include two doses of MMR for all children. And that decision is what helped to eliminate measles entirely from the U.S. in 2000. and the Western Hemisphere in 2016. I mean, yeah. That's so interesting, too, just in the context of like the biology of measles, right? Because you need such high vaccination coverage to be able to achieve herd immunity and protect everyone around you. So it makes sense that a second dose where now you're getting 97% efficacy in like lifelong antibodies,

that that is what's going to allow you to achieve herd immunity rather than a 93% percent. And yeah. How interesting and cool, Erin. It was such an enlightening, like, exercise to go through. Like, what does this look like? We know that they're making decisions. We know that they're considering all of these different things. But, like, how does new data influence a recommendation? Yeah, like, walking through an example of that. It was, yeah. Yeah. Because it's something we don't think about. We're just like, oh, here's the schedule. And you're like, okay, but like, who and why? And how did you come Why do we need four doses of T-DAP and then a booster? Because that's what the data says we need.

What? That's, I mean, evidence-based. Oh. Evidence-based medicine. Isn't that interesting. Which, yeah, I mean, and then they change the recommendations on adults getting like a pertussis booster, like a T-D, rather than just a T-D a few years back because of circulating pertussis. I mean, there's-s Science changes by design. It doesn't, it's like, right?

Like, this is part of what science is. Yeah. why science works is because we evaluate and consider and consider and then change recommendations based on that on that these are not arbitrary decisions like that's that's the message that we really wanted to get across the ACIP takes an evidence-based approach that weighs many different factors to come to a final recommendation there is data and reason and logic and evidence backing up each one of these recommendations, such as timing, when to get the first dose of a vaccine. This is determined by the disease itself and when a child might be at highest risk for

an exposure to the disease. Right. Is at high risk for complications from the disease? And also how well they're going to respond to the vaccine in terms of are they going to mount an adequate immune response that will protect them long term? Like we talked about with maternal antibodies sort of circulating in baby for a while after birth so that vaccines don't induce this long-term immunity. Right. Typically, it is recommended that a child gets a vaccine as soon as possible. Multiple doses are determined by how well one dose induces an immune response. Some vaccines need two to create long-lasting immunity.

Others like T-DAP or D-TAP require periodic boosters. Flu, of course, is annual. And I can understand that it feels like there are a million vaccines and a million jabs, but each one of these vaccines is so critical. And combo shots like MMR and TDAP help to cut down on the number of jabs that your kid gets. Right. I love combo vaccines. But even each one of the combo vaccines has to be studied and tested in all the different age groups and in all the different scenarios, which is why some are used for some age groups and not others like the MMR Veracella vaccine technically is not recommended to be given to kids at the 12-month visit, but is at the

four to five or six-year-old visit. Right. And it's because of the data on the risks versus benefits. Yeah. These are carefully made decisions. Yeah. Right. Like the bottom line is that the childhood vaccine schedule that we have here in the U.S.

has been and continues to be continuously evaluated multiple times a year by a team of highly qualified individuals who have the best interests of the American public at heart. That is historically been its role. Yeah. I hope that that is what its role will be in the in the years to come. It's protected us for so long. I hope that it continues to do so. Yes. The childhood vaccine schedule is safe. It is effective and it has saved and continues to save millions, not an exaggeration, millions of lives of some of the most vulnerable members of our society every single year. Yeah. Yeah. It's a amazing, Erin. So, Erin, now that we know the history of the ACIP and how they make these

decisions and why it is so vital that they do what they do, can you tell me why we might see some differences in the U.S. compared to other countries around the world? Yeah, I can. And then get into what we know about what these vaccine preventable diseases look like across the globe. Yes. Yes. We'll take a quick break and then get into it. Anyone who works long hours knows the routine. Wash, sanitize, repeat. By the end of the day, your hands feel like they've been through something. That's why O'Keeffe's Working Hands hand cream is such a relief.

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So the World Health Organization has a list of vaccines that are recommended for all children. And that schedule and those recommendations are essentially the same as what the CDC recommended schedule is in the U.S., which, again, is mostly influenced by recommendations. recommendations from ACIP, except there are a few big exceptions. One is that we in the U.S. do not use the BCG vaccine, which is a vaccine against tuberculosis and is recommended by the World Health Organization to be given at birth for all children. We don't do this in the U.S. because historically, rates of tuberculosis have been relatively low. I mean, not historically, historically, but in recent times at this point in time. That could change in the future, but that's

the recommendation right now. So we don't use the B.S. BCG vaccine here in the U.S. But overall, the World Health Organization recommends vaccines for all children that include hepatitis B, polio, diphtheria, tetanus, and pertussis, the DTAP, Hibb or the homophous influenza, pneumococcus, rotavirus, measles, rubella, and HPV. And then the World Health Organization goes on to have a number of other recommendations, because of course the World Health Organization is having to kind of stratify across the globe. where they might recommend certain vaccines only for children who live in certain regions

or who are in certain high-risk populations, either geographically or just population-wise, or in countries that have vaccine programs with certain characteristics. And the U.S. falls into that. What does that mean? Let me tell you about it. Okay, okay. So there are some vaccines that we went over last week that we give in the U.S. that weren't on that list I just read from the World Health Organization.

Specifically, that is mumps, varicella, flu, meningitis, and HEPA. The reason that we give those vaccines in the U.S., and they're not on the recommended for every single child across the globe list, is number one, mumps, varicella, and flu are recommended by the World Health Organization for all kids if they live in a place that has an immunization program that can actually get at least 80% or more of vaccination coverage, or if they have access to combination vaccines. So in parts of the world that are still struggling to even get kids access to vaccines or who can't get or can't afford or maybe can't, like don't have the storage capacity,

if vaccines have to be refrigerated, et cetera, for whatever reason, if they can't get combination vaccines, or they just don't have the capacity to vaccinate, then the World Health Organization says prioritize, measles, rubella, mumps and varicella come later, essentially. Does that make sense? Similarly, hepatitis A and meningitis, which are on the vaccine schedule in the U.S.

are on the World Health Organization list of recommended for high-risk populations, which, based on our data in the U.S., the U.S. is one of them. We had really high rates of hepatitis A and meningitis, enough so that the CDC said, hey, we are going to vaccinate all of our kids to prevent morbidity and mortality from these diseases. And then there are a lot of other vaccinations that are given in other countries, like for Japanese encephalitis or for dengue or yellow fever, that we don't give in the U.S. on an everyone basis because they do not circulate in as high as numbers here in the U.S. Yeah. So that's why our schedule looks a little bit specific to our country.

Yeah. Yeah. And we've said it a few times, I think, maybe more than a few times between last week and this week. But I do think it bears repeating. It is very easy because of the incredible success of vaccines to think that these diseases that we are vaccinating against are a thing of the past. Yeah. Because it is true that the rates of illness and severe illness and death from almost all of these childhood vaccine preventable. diseases have plummeted both here in the U.S. but also across the globe. And that is incredible. It is. It is. It is amazing. It is such a huge feat that I think back like, okay, you know, like, okay, we're trying to think of a time travel movie. Kate and Leopold, for instance, which that's a deep cut. That's a deep cut. Right. Okay. Okay. somebody comes from the huge acman is like a time traveler from the past anyway i always think about if someone were able to travel to the present day from the past one of the things that would instantly be so

magical is vaccines like not magical but just profound right in in what it has done i'm sure it would feel magical quite honestly yeah leopold would really have appreciated vaccines maybe he did did they talked about it in the movie i have not seen it since it was in theaters at the dollar like 20 years ago. Oh, that's hilarious. I'm going to go watch it now. I know. But it's true.

Vaccines saved today in 2025 an estimated 4 million lives every single year. Four million. Yeah, the World Health Organization actually estimates three and a half to five million. So, like, I mean, it's incredible. Conservatively, four million. Exactly. Which is like wild. Conservatively.

But the thing is that we could be saving even more. because while we have made huge strides in reducing the burden of these diseases, we have not eradicated any of them, aside from smallpox, which we no longer vaccinate for anywhere across the globe because it has been eradicated. And also Rinderpest, which is a disease of cattle. Well, actually, there's Rinder Pest, too. Well, actually, don't worry, I wrote Rinder Pest down. But until we can actually eradicate these other preventable diseases, a case. Anywhere represents the risk of disease everywhere, especially because in the face of growing anti-vaccine sentiment in the U.S. and around the globe, vaccine preventable diseases are on

the rise. As we record this, which is early March 2025, in the U.S., we are in the midst of a very significant measles outbreak that is continuing to spread. Yeah. These numbers are way out of date already. I know. Yeah. By the time this episode comes out, they will. unfortunately, I'm sure, be much worse. And the current outbreak is not typical. It is not common. Nope. And like you mentioned already, Erin, in the U.S., measles was declared eliminated in the year 2000, which essentially means that we had had no continuous transmission of measles for an entire year, which meant that from that point forward, any cases that popped up, like anything more than three cases of measles,

considered an outbreak in the U.S. And that was huge. And it wasn't just the U.S. Like you said, in 2016, the World Health Organization declared measles eliminated from the entire Western Hemisphere. And around that time, the World Health Organization European region also reached its lowest point ever in Europe. And then things started to get worse again. In the U.S., between 2000 and 2010, so shortly after. we were declared eliminated, there were only three years in that 10-year period where we had more

than 100 measles cases in the U.S. Between 2011 and 2021 in that 10-year period, seven years had more than 100 cases, including 667 cases in 2014, 381 cases in 2018, 1,27 cases in 2019, 1,274 cases in 2019, And last year in 2024, we had 285 cases. Right now, it's early March, and the CDC last updated their measles disease outbreak surveillance on February 28th. Not often enough, I feel like I have it. Once a week, every Friday, yeah. Yeah.

But as of February 28th, there had been 164 confirmed cases and one child died. That is the first time that a child has died of measles in the U.S. since 2015. In the current outbreak, and again, I know these numbers are outdated by the time this episode comes out, 20% of these kids, and I say kids because 82% of these cases are in children, 20% of them have been hospitalized, and 95% of cases were in either unvaccinated individuals or people whose vaccination status is unknown. And in every case, whether an individual is vaccinated or unvaccinated, this is a preventable illness.

Yes. And it's not just measles. It's not just measles. And before we move on to the other diseases that are vaccine preventable and these outbreaks that are happening, I want to talk about something that I think can generate some confusion when it comes to looking at these numbers. So you'll see in an outbreak like measles, like these measles outbreaks, that there is a number of people who are vaccinated who contract measles. And that could be for a million different reasons, right? Like some of us measles vaccines don't induce as strong of an immune response. Right, 3% of us.

Again, why herd immunity is so important. And because in an area, the general population is much more vaccinated than unvaccinated. Right. We have over 80% vaccination coverage in the U.S. Yes. It can seem like there is a high number or an equal number of people who are vaccinated compared to those who are not vaccinated. Does that make sense? Right.

But that's not. That is actually disguises what is truly happening. And that is if you look at the proportion of people who are unvaccinated, what is the likelihood that they will get measles much, much, much higher than if you are vaccinated? Right. I think you said last week, Aaron, it was like 170 times higher. 140 times higher. Yeah. 140 times higher.

So. And so, but like just reporting on these sheer numbers. only tells part of the story. Right. Right. Like we, it doesn't tell us what proportion of unvaccinated individuals in a community are infected compared to those who are vaccinated. Exactly.

Exactly. And I think it kind of is, these numbers are sometimes used to undermine the power of vaccines in protecting you. I remember that happening especially a lot during the mumps outbreak a few years ago because especially mumps, we see more waning immunity than we see with measles as well. And so it kind of compounded that same. problem. But it is, yeah, the proportion, the likelihood that you get one of these illnesses is significantly higher if you are unvaccinated or under vaccinated compared to if you are vaccinated

fully. And on top of that, complications. Exactly. This isn't just about whether or not you are getting the disease. It is about how sick you are getting and your chances of dying. And vaccines protect you from these things. Exactly. And it is not just measles. It's not just measles. Hurtussis cases, whooping cough, has been on the rise year over year. In 2024, there were 35,000 cases of pertussis in the U.S., and over 2,700 of those were babies under one year old. And six of those babies under one year old died in the U.S. in addition to four other kids that were over one year old. That's 10 children who died. last year alone in the United States from a vaccine preventable illness. Yep. Did not have to happen. Yeah.

Polio is another example that made headlines back in 2022 here in the U.S. So we eliminated polio in the U.S. in 1979. And there is, of course, a huge campaign to try and eradicate polio across the globe. And we're not there yet. And yet, there was a case of paralytic polio in 2022 in the U.S. And in conjunction with that case, there was enough virus being detected in the wastewater in surrounding areas that the U.S. was actually added to the World Health Organization list of countries with endemic circulating vaccine-derived strains of poliovirus. Now, this is a strain of the virus that has evolved from the vaccine strain of the oral poliovirus vaccine. So this is a disease that people get not from the vaccine itself, not from getting the vaccine,

but from a mutated version of this virus that can persist in the environment from the vaccine-derived strain that evolves to regain virulence or infectiousness and then can infect other people and get them sick. We do not use this oral polio vaccine in the U.S. and we have it since the year 2000. But there are some other countries across the globe that still do because it's a much less expensive vaccine. It's easier to administer because it's oral rather than injected. You have to have less public health investment or infrastructure. And in some other places that still had circulating like wild type polio virus, it provided good protection. But it comes with this potential cost and that cost has now been more vaccine-derived strains circulating.

Mm-hmm. And globally, in 2023, which is the latest year that the World Health Organization has these global dashboard numbers, there were over 24,700 reported cases of diphtheria, certainly more that were not reported. Over 669,000 cases of measles globally. over 163,000 cases of pertussis, 387,000 cases of mumps, 35,000 cases of rubella, and over 21,000 cases of tetanus, and the list goes on. So all of these diseases that we are protecting our children against with vaccines still circulate around the globe. And because of global travel, that means that many of these diseases can circulate anywhere.

And I mean, the case of tetanus, those bacteria are just everywhere already. Right. I mean, and so much of this is just like, it is, these numbers are staggering and they're so hard to, to absorb to like actually wrap your head around. Yeah. And this, I think, speaks to how, why it is so important that an investment in global public health and global health is crucial. And it's just, it's just something that is so obvious. I know. It's so clear.

I know. vaccines are not only the best thing that you can do to protect yourself and your children from infectious disease, but also the best thing that you can do to protect your community. Because vaccines are protecting us against communicable diseases. These are things that are spread from person to person. So it is, like we said last week, our social responsibility to vaccinate. Like for the health of ourselves, yes, I don't want to get sick and end up hospitalized, but also for the health of our communities. And it is for this reason, because of the health of the public, that there are vaccine requirements for participation in public life, like public schools. Right. And when these requirements are waived or changed to recommendations rather than requirements or if they're done away with altogether, we are putting both individual and public health at risk. We then see children hospitalized and dying and resurgence of diseases that have previously been eliminated.

So understandably, there is a lot of interest in addressing vaccine hesitancy. How the heck do we do it? It's a great question. The World Health Organization actually named vaccine hesitancy one of the top threats to global health in 2019. And that's alongside like climate change and air pollution, antimicrobial resistance. The next global influenza pandemic, like big scary things include vaccine hesitancy. Vaccine hesitancy, yeah. So lucky for us, there's a lot of research that has been done and that continues to be done on how to best try and address this.

And we started out last week's episode, like this whole vaccine series, part of what we wanted to be able to talk about is just how prevalent vaccine misinformation is and how easy it is to believe it because of the way that misinformation and disinformation preys on our fears and anxieties, especially when it comes to our kids. Yes. And we are all susceptible to misinformation, including us. Do you hate to admit it, but it's true. It's true. And we know that when it comes to vaccine hesitancy, which is defined as the reluctance or refusal to vaccinate

despite the availability of vaccines, there is a spectrum of belief. But I want to first set the record straight. The vast majority of parents still vaccinate their kids on time, according to the ACIP schedule, period. Period. Yay. That's amazing.

And part of that is because we do have these childhood vaccination requirements for school entry. Exactly. Yeah. Yeah. It's great. It's amazing. But when we are looking at the minority of people who meet these criteria of vaccine

hesitancy, there is a spectrum. And there are some people, many of whom are the spreaders of disinformation, who are profiting heavily off of vaccine hesitancy in one way or another, or who have wrapped up their identities in these false beliefs to a point where there really is no changing their mind. But there are also a lot of people who are vaccine hesitant who just have questions or fears or heard scary things on TikTok and they just don't know who to believe. And recognizing this idea that we can all fall prey to misinformation, what that does is a allow us to approach all of our conversations about vaccines from a place of understanding and

empathy. It allows us to actually have productive conversations about vaccines rather than just combative ones, like with my uncles. I'm sorry. It's true, though. But we also know that a lot of parents rely on their health care providers as primary sources of information when it comes to their children's health. Right. And that's great. We should all have a health care provider that we can trust to ask our questions and get answers without fear of judgment or reprisal. And studies show time and again that a strong recommendation from your health care provider drives vaccine uptake. As do strategies like motivational interviewing, which is a technique that relies on like open-ended questions and affirming and reflecting back statements and concerns and then summarizing information.

and then advising, but all in a way that actually requires that you listen. Yeah. I mean, Google it. It's like a really important and technique. And I think that there's a lot more to it. Yeah. So if you're interested in learning more about it, definitely. And it search.

It requires that you start from a place of empathy, from where a person is coming from and the concerns that they legitimately have. Yep. But a lot of us and a lot of you listening feel like maybe you feel like you'll never be in a position to directly, like, advise someone on whether or not to get vaccinated. That does not mean that we can't all be working towards increasing vaccine acceptance in our own communities. Most parents still vaccinate their kids. The majority of kids in the U.S. are getting their vaccines on time according to the ACIP schedule. If we start talking about this fact, like normalizing

this, talking about when you got your kids vaccinated, how you just got your flu, shot in your arms a little bit sore, but you're feeling great about it. That is one way that we individually can help to move this needle back towards vaccine acceptance and away from this idea of vaccine hesitancy. Yeah. We collectively talk a lot about vaccine hesitancy, but I think we don't talk enough about getting vaccinated and like normalizing this process. I love this because I feel like I have done this with friends where I'm like, oh yeah, I got my flu shot and my arm is still a little bit sore and they're like, oh, that reminds me. I have to go get my flu shot. Exactly. Exactly. It's just something as simple as that. I love it. I also love things that make it easier. Like one time,

I got my flu shot and my COVID shot this year when we went to the YMCA where my kids were doing gymnastics and they had a table there. And we went early because we thought my kids wanted to play in a thing and then they didn't want to and we're like, well, fine, we're just going to get our vaccines then. And it's so great. It made it so easy. Yes. Yes. But breaking down. those barriers to just make it easy. Yeah. When you're just out, because there are so many other things that are, that do stand in the way of someone being able to take time off to go get vaccinated when our clinic hours open. And I know that there are a lot of different organizations that really push towards this, like we're having, you know, a van that comes and does like

on-site vaccinations. Yeah. It's great. Talking about this and normalizing this process and talking about how incredible the benefits of vaccination are, is so helpful. And we can all start having these conversations with our friends and family who already vaccinate and maybe those who might be more towards hesitant. Yeah. And I think it's important to wonder what might that conversation look like. Yeah. What could it look like? And I mean, who knows, right? Like there's a huge spectrum. Yeah. And it depends a lot on how receptive someone is to changing their mind or to hearing conflicting information. something that conflicts with what they've heard or what they hold in their hearts, right? But it does

start, like you said, Aaron, with empathy and with asking questions. So if you know someone who's vaccine hesitant or you learn that someone is, you could start by asking, why? Like, what do you know about vaccines? What specific worries do you have? Yeah. And then asking, you know, can I talk with you about this? Can I share my thoughts? Is there, can I share some, some information that I have learned? with that, can we engage in this way? Yeah. And maybe it's a flat no. Maybe they're like, not interested. Do not talk to me anymore about this. Okay. Right. That's fine. But maybe it's not. Maybe they're like, actually, yeah, I have been really nervous and I don't know where to turn. And maybe you can help to answer their questions. Or maybe you can't. Maybe you're like,

I too, I don't know where to turn. But you can at least look together. You can help them find where to look. That is how, this is proven to be, how progress is actually made on this front, human-to-human interaction. People who have social capital in their community, right? Like people who are trusted, people who are like, no, I get it. I know where you're coming from. I can relate to you and I will relate to you. I won't stand here in a position of power and tell you and look down on you and condescent to you, right?

Like I will say, okay, I hear you, right? And all of us, having these conversations is how we can make progress. each of you has the most sway and reach within your own community. And research does show that this community-based activism, even if it's just informal, even if it's just chatting with a neighbor, this has the greatest opportunity of making an impact. And one really important thing to remember, and I think that especially as our bandwidth grows ever more shorter these days, speaking personally. Personally, yes. Is that you should pick your battles, right? Like you can pick your battles.

We, if you're not in the headspace or you feel like someone is just super resistant and it's only going to drain you further so that you don't have the emotional bandwidth to take care of yourself. Or if you feel yourself getting heated and you're like, this is not going anywhere. I'm just getting angry at this person. Yeah. Don't be ready to take a step back. Try another day. This is a constant, constant battle. But we truly can make progress.

Yeah. We really, really can't. We maybe sound very cheesy, but genuinely, we believe that. We do. Also, data backs it up. Yeah. Evidence-based. Speaking of evidence.

Speaking of evidence. Great transition. Thank you. We've got more sources for this. Let me see if I can shout out any in particular that I found helpful. If I can find this tab, here we go. Yeah, there is a paper by, Walton at all from 2015 called the history of the United States Advisory Committee on Immunization

Practices. And it was really insightful in terms of how this committee came to be. And then I have a bunch of other websites for a bunch of other sites from CDC and WHO that can help sort of put more context into this. I used a lot the World Health Organization Global Dashboard, their data portal. So we will link to that. I also really enjoyed a paper by friend of the pod, Peter Hotez, from 2019 titled America and Europe's New Normal, the return of vaccine preventable diseases. And I also had a number on that whole idea of how we talk about vaccine hesitancy and kind of moving the needle. So we will post the list of all of our sources from this episode and every one of our episodes on our website, this podcast will kill you.com under the episodes tab.

We will. A big thank you to Bloodmobile, who provides the music for this episode and all of our episodes. They sure do. Thank you so much, Bloodmobile. Thank you to Leanna Scolachi and Tom Brigh Focal for the incredible audio mixing. And thank you to Brent and Pete and the whole video editing team as well. Thank you, thank you. And thank you to you listeners for listening.

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