Why RSV Is Still Circulating Into Spring 2026

Respiratory syncytial virus, or RSV, is still circulating in spring 2026 even though CDC says overall respiratory illness in the United States is very low. That unusual timing means some regions can still see RSV activity in May, especially after a later-than-expected season.

For older adults and people at higher risk, the practical takeaway is simple: check whether an RSV vaccine is recommended for you, and pay attention to symptoms that may need medical care.

Why RSV is still part of the picture

CDC’s respiratory illness data show that RSV started later than expected in many parts of the country this season. CDC also says higher levels of RSV activity may continue through April in many regions, which helps explain why the virus can still matter in early May.

At the same time, seasonal flu activity is falling, and overall respiratory illness remains low. In plain terms, the spring respiratory-virus picture is quieter than it was in winter, but it is not zero.

Who CDC says should still get protected

CDC recommends RSV vaccination for adults age 75 and older, and for adults ages 50 to 74 who are at increased risk of severe RSV illness.

CDC says the vaccine is not an annual shot. If someone already received one dose, they should not get another dose at this time. Eligible adults can get vaccinated any time of year, although CDC says late summer and early fall are the preferred times before RSV usually starts spreading.

What RSV can feel like

RSV usually causes cold-like symptoms. Common signs include runny nose, congestion, cough, sneezing, fever, wheezing, and a decrease in appetite. Symptoms may appear within 4 to 6 days after exposure.

Most healthy adults recover at home, but RSV can be more serious for older adults and people with certain health conditions, especially those with lung disease such as asthma or COPD.

When to call a clinician or seek urgent care

CDC says adults should contact a clinician if symptoms worsen, breathing becomes harder, or RSV seems to be triggering a flare-up of another condition. Seek urgent or emergency care for trouble breathing, chest pain, confusion, bluish lips or face, or other severe symptoms.

For families and caregivers, the main job is to notice who in the household may be at higher risk and make sure they have the right protection and a plan if they get sick.

What readers can do now

Check age-based and health-based risk factors, especially for adults 75 and older or adults 50 to 74 with conditions that raise the risk of severe RSV. If vaccination is recommended, ask a clinician or pharmacist about getting it now rather than waiting for the next season.

Basic sick-day habits still help: stay home when ill, cover coughs and sneezes, wash hands often, and avoid close contact with infants, frail older adults, and other high-risk people while sick.

MedlinePlus notes that vaccines help protect both individuals and the wider community, which is one reason public-health experts still encourage timely vaccination when it is recommended.

Sources

Editorial note: Weence articles are researched from cited public-health, medical, regulatory, journal, and reputable news sources and may be drafted with AI assistance. They are checked for source support, clarity, and safety guardrails before publication.

This article is for general informational purposes only and is not medical advice. Research findings can be early or incomplete, and health guidance can change. Always talk with a qualified healthcare professional about personal symptoms, diagnosis, medications, vaccines, screenings, or treatment decisions. If you think you may have a medical emergency, call emergency services right away.