RSV Isn't Like the Flu Shot — Why Most Adults Need It Only Once, and Who Qualifies Now

People hear "respiratory vaccine" and assume yearly, like flu. RSV breaks that rule. The 2026 CDC guidance says most adults need it exactly once, and the group that qualifies is broader than many realize. With late summer the right time to act, here is the clear version.

Key Takeaways

• The CDC recommends a single RSV vaccine for all adults 75 and older, and for adults 50–74 at increased risk of severe RSV (CDC, February 2026).
• RSV is not an annual vaccine; one dose is considered enough for now, with no routine booster (CDC, 2026).
• The best time to get it is late summer and early fall, before RSV spreads (CDC, 2026).
• Three FDA-licensed adult RSV vaccines exist — Arexvy, mResvia, and Abrysvo — with no preferred choice (CDC, 2026).

Who Should Get the RSV Shot in 2026?

The CDC's February 2026 guidance says everyone 75 and older should get one RSV dose, and adults 50–74 who are at increased risk of severe illness should too (CDC, 2026). "Increased risk" covers conditions like chronic heart or lung disease, weakened immune systems, and living in a nursing home — and a patient's own attestation of a risk factor is sufficient, so you do not need a paper trail to qualify. This is a meaningful expansion from the older "60 and older, shared decision" framing.

Citation capsule: The 2026 CDC RSV guidance makes a single dose routine for all adults 75+ and for adults 50–74 at increased risk, with patient attestation enough to establish risk — a clearer, broader standard than prior seasons (CDC, 2026).

This pairs with our immunization update 2026 roundup for the full adult schedule.

Is RSV Really Not Annual?

Correct — and this confuses people. RSV vaccination is not currently a yearly ritual like influenza. The CDC states that if you have already had one RSV vaccine, you should not get another at this time, because a single dose appears to protect for at least a couple of seasons (CDC, 2026). Additional doses remain under study; ACIP will update if boosters are needed. So the question is "have I ever had it," not "did I get it this year."

Citation capsule: Unlike the flu shot, RSV vaccination is not annual; the CDC advises that one prior dose is sufficient for now, with any future booster decision deferred to ongoing ACIP review (CDC, 2026).

For caregivers, our senior care at home article covers protecting older adults in the household.

When Should You Get It?

Late summer and early fall is the sweet spot, just before RSV typically starts circulating (CDC, 2026). Because it is a one-time dose, timing matters less than simply not forgetting it during the back-to-school and flu-clinic rush. You can co-administer it with other adult vaccines in the same visit, though limited data suggest co-administration may slightly lower antibody titers — the clinical significance is unknown (CDC, 2026).

Citation capsule: The CDC recommends late-summer or early-fall RSV vaccination since it is a one-time dose, and allows same-visit co-administration with other vaccines despite limited data on slightly lower titers (CDC, 2026).

Our sleep apnea and CPAP coverage article is relevant for the same older-adult audience.

Which Vaccine and Is It Safe?

Three FDA-licensed adult RSV vaccines are recommended with no preference for one over another: GSK's Arexvy, Moderna's mResvia, and Pfizer's Abrysvo (CDC, 2026). Common side effects are the usual sore arm, fatigue, and mild fever. As with any vaccine, serious reactions are rare and reportable through VAERS. The bigger risk is skipping it: RSV sends tens of thousands of older adults to the hospital each year.

Citation capsule: Arexvy, mResvia, and Abrysvo are all acceptable adult RSV vaccines with no CDC preference; side effects are generally mild, and the greater danger for eligible older adults is remaining unvaccinated (CDC, 2026).

Frequently Asked Questions

Do I need an RSV shot every year?

No. It is a one-time dose for now; the CDC says a prior dose means you do not need another this season (CDC, 2026).

I'm 60 and healthy — do I qualify?

The 2026 guidance centers on 75+ and 50–74 at increased risk; discuss your individual risk with your clinician (CDC, 2026).

Can I get it with my flu and COVID shots?

Yes, same visit is allowed, though co-administration data are limited (CDC, 2026).

When is the best time?

Late summer to early fall, before RSV spreads (CDC, 2026).

Conclusion

RSV vaccination is the exception that breaks the yearly-shot habit: one dose, no routine boosters, and a clear adult group — 75+ and at-risk 50–74. Get it in late summer, pick any of the three licensed vaccines, and move on. The mistake is assuming it is annual and skipping it, or assuming it is optional when you are squarely in the risk group.

Sources

• CDC. RSV vaccine guidance for adults. Updated February 24, 2026. Retrieved 2026-08-11. https://www.cdc.gov/rsv/vaccines/adults.html
• CDC. RSV (Respiratory Syncytial Virus) adult immunization, 2026. Retrieved 2026-08-11. https://www.cdc.gov/rsv/hcp/vaccine-clinical-guidance/adults.html