Pediatric Vaccines are a System, While Adult Vaccines are Often Left Up to “Vibes”

A quick guide to the adult vaccines you may have forgotten about, and the one question to ask your doctor.

This piece is part of a paid campaign with the American Academy of Family Physicians (AAFP) on adult vaccination. Thanks to AAFP for partnering with Unbiased Science and for supporting our work to make public health science accessible.

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When my son was a newborn, I was sent home with a piece of paper (and as many diapers as I could stuff in my overnight bag). It was a schedule. Two months, four months, six months. Hepatitis B, DTaP, Hib, polio, pneumococcal, and rotavirus. The pediatrician’s office called to remind me. The chart followed him from visit to visit. The nurse pulled it up on her screen before she even said hello. There were so many safeguards and reminders. (All of which, of course, assumed I had a pediatrician and access to care in the first place.)

I don’t remember most of those first months after my kids were born. I remember the fog, the blowouts, my son waiting until I opened his diaper to pee in my face, and nursing at 3 a.m. without knowing what day it was. And truthfully, I remember showing up to those well visits because someone else was holding the schedule for me. The system was doing the remembering.

That’s how pediatric vaccination works in this country, when it works. There’s scaffolding around it. Well-child visits are billed and tracked, schools require records, and doctors are trained to bring vaccines up at every visit. There’s a chart, a registry, a workflow.

Then your kid grows up. And so do you. And nobody hands you the adult version of that paper, because there isn’t one.

I’ve written a lot about specific adult vaccines lately. I wrote about HPV, the vaccine that didn’t exist when I was a teenager and that I would go back in time to give my younger self if I could, to spare myself the diagnosis and the colposcopy that came with it. I wrote about RSV, the middle child of respiratory season, and my mother standing in a CVS aisle calling to ask what the vaccine was for. My mother is in her seventies and has a daughter with a doctorate in public health, so she had someone to call. Most people don’t. Most people are standing in that aisle alone, reading the back of a pamphlet, and deciding it’s easier to just not. We’ve published content on COVID, on shingles, on pneumococcal disease, on hepatitis B, on the updated flu vaccine, and on Tdap in pregnancy. A whole library of pieces, and each case is good on its own. But the thing that ties them together is what nobody writes. Adult vaccines exist inside a system that isn’t designed to deliver them. Let’s discuss…

The schedule, briefly

The AAFP adult immunization schedule for 2026 fits all of this on a single page, which is a real feat. Reading it cold, though, is hard. There isn’t one timing rule. There are several, layered on top of each other:

For most adults, year after year: flu vaccine (annually, every fall) and COVID shot (at least once a year for most adults, twice for adults 65 and up). These aren’t “boosters” in the way people often think of them. Their formulations are updated to match the viruses circulating that season, because flu and SARS-CoV-2 viruses evolve quickly enough that last year’s vaccine may not be a great match for this year’s strain. For viruses like flu and SARS-CoV-2, repeated exposure doesn’t confer lasting immunity, and vaccines generally follow the same logic. An annual vaccine for an annually circulating, rapidly evolving virus isn’t a sign that something is broken. It’s a sign that science is keeping up.

On a longer interval: Td or Tdap, every ten years (not just when you step on a rusty nail!). And after certain wounds, if it’s been over five years since your last dose. Easy to forget about, easy to be overdue without realizing it.

When you hit a certain age: shingles vaccine at 50, pneumococcal at 50, RSV at 75.

If you’re pregnant: Tdap with each pregnancy, flu vaccine during flu season, and RSV shot during the seasonal window, all timed to protect the baby in those vulnerable first months before they can be vaccinated themselves. If you’re planning a pregnancy, it’s also worth checking whether you’re up to date on live vaccines like MMR and varicella beforehand, since those can’t be given during pregnancy.

If you have a specific risk factor: an immunocompromising condition, a job that exposes you to bloodborne pathogens or sick patients, a household member at higher risk, or international travel to places where vaccine-preventable diseases are more common. The schedule accounts for all of it.

If you’re catching up: HPV is on the adult list for catch-up through age 26, with shared decision-making through age 45. MMR, hepatitis B, varicella, and others may also be worth revisiting if you were never vaccinated, incompletely vaccinated, or simply don’t know your history.

Four or five different timing rules on one schedule, none of which map onto a yearly rhythm the way a child’s well visits do.

Why this is so much harder than it sounds

Adult primary care isn’t built around immunization the way pediatric care is. There’s no analog to the well-child visit. There’s no school requirement reminding you. Some employers require some vaccines, especially in healthcare, the military, and certain travel-heavy jobs, but that’s a far cry from the universal school-entry infrastructure that scaffolds childhood immunization. Your insurance might cover the vaccine, but it doesn’t call you.

There are pieces of a system. Medicare offers an annual wellness visit at no cost, but it isn’t required, and most people don’t know to ask for it. My pharmacy sends me reasonably timed vaccine reminders. My primary care physician’s (PCP) patient portal pings me when something is due. These are useful, and I use them (when my inbox isn’t being slammed by some competing work emergency). But they’re partial, and they don’t talk to each other. My shingles shot might live in one pharmacy’s record, my flu shot in another because I was traveling that week, my travel vaccines somewhere else entirely, and my PCP’s chart catching whichever ones I remembered to mention at my last visit. None of it adds up to a single place that knows what I’ve had and what I’m due for, the way my son’s pediatric chart does for him.

And then there’s the mental load. I can barely remember to eat lunch. I have alarms set for when to stand up from my computer and when to shower. I’m juggling thirty different school projects, wear-this-color-shirt day, dental cleanings, dog groomings, kids’ birthday parties on Saturday mornings that I find out about on Friday nights. Knowing when to schedule which vaccine is another tab my brain has to keep open, and most days, there’s no more room on the bar.

My PCP visit got bumped twice last year, once because something came up at the kids’ school and once because of work. Both legitimate. Both the kind of thing that doesn’t happen to a four-month-old, because a four-month-old doesn’t have a calendar. The four-month-old has a parent whose job, in that specific window, is to keep the appointment. And a system that makes sure they do.

Adult life doesn’t give you that. Adult life gives you a calendar that’s constantly being interrupted by other people’s calendars, and a body that’s quietly accumulating risk in the background while you reschedule.

And the risk is bigger than people often realize. The “I never get the flu shot, the flu isn’t that bad for me“ mindset misses that flu infection has been linked to elevated risk of heart attacks and stroke in the weeks afterward, especially in older adults. Shingles vaccination has been linked to a meaningful reduction in dementia risk. The evidence on these downstream effects is still developing, but it’s pointing in a consistent direction: adult vaccines are doing more than preventing the infections they were designed to prevent. The stakes of the system not working aren’t just “you might catch the flu.” They’re heart attacks, strokes, hospitalizations, and cognitive decline.

My own example

The HPV vaccine sits weirdly in my own history because of this. It was brand new when I was 20. There was real evidence behind it, but also real wiggle room in how it was being recommended, especially for women already in their early twenties, already sexually active, already past the textbook target window. The shared decision-making lane on the schedule today exists precisely because that wiggle room is real. The problem wasn’t that the science was unclear. The problem was that the decision was entirely on me, a 20-year-old grad student, with nobody in the system whose job it was to walk me through it. So I did what most adults do when nobody helps them weigh a decision: I did nothing. And then I had a colposcopy to investigate abnormal cells on my cervix, the kind of changes caused by HPV that the vaccine exists to prevent.

The workaround

The gap between pediatric and adult vaccination in this country isn’t a willpower problem; it’s a design problem. Vaccines for kids are a default, and vaccines for adults are an opt-in. Defaults beat opt-ins every single time, in every domain of human behavior we have ever studied. That isn’t your fault. That’s how the system is built.

So what do you do inside a system that isn’t built to help you?

You don’t need to figure out the entire schedule, or memorize ACIP recommendations, or come in with a printout. You need one question, asked once a year, of one person who knows your history.

The question is: am I up to date on the vaccines recommended for me?

That question shifts the cognitive load from you to the system, where it belongs. Your family physician can consider your age, health history, job, whether you are pregnant or planning to become pregnant, whether you travel, what you may have missed, and what’s new since your last visit. They can tell you which bucket you’re in right now, and what to prioritize if you’re due for more than one thing.

“Up to date” is also a moving target, which is part of why this question is worth asking more than once. The schedule changes. You age into new recommendations. New vaccines get added. Your own risk factors shift over time. Being up to date last year doesn’t mean you’re up to date this year. It also doesn’t help that our federal health infrastructure has felt a bit unsteady lately. January’s HPV schedule change, made outside the standard process and later struck down on procedural grounds, gave a lot of us whiplash. The recommendations themselves are still grounded in evidence, but the process has gotten noisier, which makes the family physician who actually knows you more important, not less.

Adult vaccines aren’t one-size-fits-all, and they aren’t supposed to be. The recommendations bend around your age, your health, your work, and your life. That’s the point. What we haven’t built yet is the system around them, the part that should make it easy to know what you need and when.

Until we do, the workaround is small and doable. You don’t have to become a vaccine expert to navigate it.

None of the adult vaccines that have mattered in my life were on a piece of paper anyone handed me. Not the HPV vaccine, not the flu shot I’ll get again this fall, not the Tdap I made sure I had before my niece was born. I had to find my way to each of them myself.

Am I up to date on the vaccines recommended for me?

You don’t have to know the answer. You just have to ask the question.

Stay Curious,

Unbiased Science