Fall vaccines for adults: flu, COVID-19, and RSV, and who needs which

Every adult should get a flu vaccine and an updated COVID-19 vaccine this fall, ideally in September or October. Adults 65 and older should choose an enhanced flu vaccine and plan on a second COVID-19 dose six months after the first. An RSV vaccine is a one-time shot for everyone 75 and older, and for adults 50 to 74 with certain health conditions.

The questions I hear most this time of year are “which one do I need?” and “didn’t the rules change?” They did, more than once, so here is where things stand for the 2026-2027 season.

The flu vaccine: every adult, every year

Influenza changes every year, so the vaccine is updated every season and last year’s shot does not cover this one. This season’s vaccines protect against three strains, all of them updated.

For most adults, any flu vaccine approved for your age works well, and the best one is the one you actually get. If you are 65 or older, ask for an enhanced version: high-dose, adjuvanted (which contains an ingredient that strengthens the immune response), recombinant, or the new mRNA flu vaccine approved in August 2026 for adults 50 and older. These produce a stronger response in older immune systems. In a large randomized trial of adults 65 to 79 published in the New England Journal of Medicine, the high-dose vaccine reduced hospitalizations for flu or pneumonia by about 24 percent compared with the standard dose. That is a real but modest advantage, so if the enhanced version is not available, take the standard one rather than waiting.

Two practical notes. An egg allergy, however severe, is no longer a reason to avoid any flu vaccine. And if you are 65 or older, avoid getting your flu shot in July or August, because protection wanes over the season and an early shot may fade before the winter peak.

COVID-19: what the recommendation says, and why it confuses people

Current CDC guidance, updated in late September 2026, recommends a 2026-2027 COVID-19 vaccine for all adults. This year’s vaccines target XFG, a recent variant in the same JN.1 family as last year’s. Adults 65 and older are advised to get two doses this season, the second about six months after the first, because protection against severe illness fades over time. You need at least eight weeks between your last COVID-19 dose and this season’s first.

Here is the source of the confusion. The FDA approvals are narrower than the recommendation. The vaccines are approved for everyone 65 and older, but for adults under 65 only if they have at least one condition that raises the risk of severe COVID-19, such as diabetes, heart or lung disease, obesity, chronic kidney disease, cancer, or a history of smoking. The approval for older adults also covers a single dose, so the second dose at 65 and older is given outside the official labeling. None of this means the vaccine is unsafe. It means the rules on paper do not line up perfectly, so a pharmacy may ask about your health history, and it is worth confirming coverage. This is precisely the kind of question your own doctor should settle with you in two minutes.

The benefit is clearest where the risk is highest. In an independent review of the past year’s research, this type of vaccine reduced hospitalization in adults 65 and older by about half.

RSV: one dose, not every year

RSV is often thought of as a childhood infection, but in older adults and people with chronic conditions it causes pneumonia and hospitalization on a scale comparable to the flu. The recommendation is:

• All adults 75 and older: one dose.
• Adults 50 to 74 at higher risk: one dose. Higher risk includes chronic heart or lung disease, diabetes with kidney or other complications, end-stage kidney disease, chronic liver disease, severe obesity, a weakened immune system, and living in a nursing home.

Unlike the other two, RSV is not an annual vaccine. One dose protects for at least two years, and if you have already had it, you do not need another at this time. The best window is August through October, before RSV starts spreading, but it can be given any time. After vaccination in adults 60 and older, studies show roughly 69 to 83 percent fewer RSV hospitalizations. There is a very small risk of Guillain-Barré syndrome, a rare nerve condition, reported at around 18 extra cases per million doses for one product, which is worth a brief conversation if you have had it before.

Can I get them all at once?

Yes. Flu, COVID-19, and RSV vaccines can be given at the same visit, and I usually recommend it. One visit, and you walk into winter protected.

Key takeaways

• Every adult should get a flu vaccine and a COVID-19 vaccine this fall, ideally in September or October; adults 65 and older should ask for an enhanced flu vaccine and plan a second COVID-19 dose six months later.
• RSV is a one-time vaccine for everyone 75 and older and for adults 50 to 74 with certain chronic conditions; if you already had it, you do not need it again this season.
• Where the official rules seem to conflict, your doctor can confirm what fits your health history and your coverage, and all three vaccines can be given the same day.