Yes. You can get RSV more than once, and the CDC says repeat infections may happen throughout life. The American Academy of Pediatrics says children and adults can get it multiple times, even during a single season. Repeat infections are often less severe than the first, but adults 75 and older and adults 50 to 74 with certain conditions, such as chronic heart or lung disease, are still at increased risk of severe RSV.
Why doesn't having RSV once protect you?
The CDC says repeat RSV infections may occur throughout life. Nearly all children get RSV before their second birthday, so most adults have had it before, often without knowing.
Having had RSV before does not reliably stop you from catching it again. That is why adults keep catching it, often from the people around them.
- First infection: usually in the first 2 years of life.
- Later infections: can happen at any age, over and over.
- No lifetime immunity: a past case does not mean you are covered this winter.
Can you get RSV twice in the same season?
Yes. The American Academy of Pediatrics says children and adults can get RSV multiple times, even during a single season. So having RSV in November does not guarantee you are safe from it in February.
We could not find a primary source that gives a reliable number for how many weeks or months protection lasts after an infection, so we are not going to guess one. If you feel sick again after recovering, treat it as a new illness: stay home while you have symptoms and follow the same return rules as the first time.
Keep in mind that a second round of cold symptoms is not always RSV. Many respiratory viruses cause the same kinds of symptoms, like fever, cough, and a runny nose. If you are not sure what you have, or you are in a higher-risk group, ask a clinician whether testing makes sense.
Is a second RSV infection milder?
Often, yes. The AAP says repeat infections are often less severe than the first one. The CDC says adults who get RSV usually have mild or no symptoms, and mild cases generally clear up in 1 to 2 weeks.
Milder is not guaranteed, though. The CDC says RSV can cause severe disease and hospitalization in adults, especially those who are older or have certain risk factors, and it can make asthma, COPD, and heart failure worse. A past infection does not change your risk group.
Who should take a repeat RSV infection seriously?
The CDC says all adults 75 and older, and adults 50 to 74 with certain risk factors, are at increased risk of severe RSV. The NHS advises getting medical advice if you get cold symptoms and have a long-term condition such as a heart or lung condition, even if past RSV infections were mild.
- Age 75 and older
- Chronic heart disease (not just high blood pressure) or chronic lung disease
- End-stage kidney disease or dialysis, or chronic liver disease
- Neurologic or neuromuscular conditions that make it hard to clear your airway
- Diabetes with complications or treated with insulin or an SGLT2 inhibitor, or severe obesity (BMI 40 or higher)
- Chronic blood disorders or a moderately or severely weakened immune system
- Living in a nursing home
Should you still get the RSV vaccine if you already had RSV?
The CDC recommends an RSV vaccine for everyone 75 and older, and for adults 50 to 74 who are at increased risk of severe RSV. It is a single dose. If you have already had an RSV vaccine, including last year, the CDC says not to get another one at this time.
The CDC's adult vaccine page does not list a past RSV infection as a reason to skip the shot, but it also does not address it directly. If you are in one of the recommended groups and recently had RSV, ask your clinician or pharmacist about timing. If you are moderately or severely ill right now, the CDC says to wait until you recover. A minor illness, like a cold, is not a reason to wait.
The CDC says the best time to get it is late summer and early fall, which means August to October in most of the continental US, though it can be given any time of year. One dose protects adults 50 and older for at least 2 years, and the CDC is still learning how long protection lasts.
When should you get care?
In an emergency, call 911Get medical advice the same day if you are more short of breath than usual, your cough or other symptoms are getting worse instead of better, or you have cold symptoms and a long-term heart or lung condition. For a baby, call the pediatrician right away if they are feeding much less than normal, are much less active or alert, or have fewer than 1 wet diaper every 8 hours.
Call 911 if anyone has severe trouble breathing (gasping, choking, or unable to get words out), lips or skin turning very pale, gray, or blue, or is floppy and will not wake up or stay awake. In a child, grunting, long pauses in breathing, or the belly sucking in under the ribs is also an emergency. Do not drive yourself if you are this unwell.
How our AI doctor decides when to send you to care ›How long are you contagious each time you get it?
Each new infection can spread to others. The CDC says people with RSV are usually contagious for 3 to 8 days. Some infants and people with weakened immune systems can keep spreading it for 4 weeks or longer.
The CDC's general rule for respiratory viruses: you can go back to normal activities when, for at least 24 hours, your symptoms are getting better overall and you have not had a fever without using fever-reducing medicine. Then take added precautions for the next 5 days, like wearing a well-fitted mask, washing your hands, and keeping distance. If a fever comes back or you feel worse, stay home again.
Common questions
Can I get RSV twice?
Yes. The CDC says repeat RSV infections may occur throughout life, and the AAP says children and adults can get RSV multiple times, even in a single season. Repeat infections are often milder than the first.
Can I get RSV again right after I recover?
The AAP says reinfection can happen within the same season. Primary sources do not give a set number of weeks of protection after an infection. If you get sick again, treat it as a new illness, and remember that other respiratory viruses cause similar symptoms.
Does having RSV make me immune?
Not reliably. Nearly all children get RSV before age 2, and the CDC says repeat infections may occur throughout life. A past infection does not lower your risk group if you are older or have heart, lung, or immune conditions.
Is RSV worse the second time?
Often not. The AAP says repeat infections are often less severe than the first one. But RSV can still cause severe illness in adults 75 and older and adults 50 to 74 with certain health conditions, and it can worsen asthma, COPD, and heart failure.
If I had RSV, do I still need the RSV vaccine?
The CDC recommends a single RSV vaccine dose for adults 75 and older and adults 50 to 74 at increased risk. Its adult vaccine page does not address a past infection directly, so ask your clinician or pharmacist about timing. Wait until you recover if you are moderately or severely ill.
Pymander is not a replacement for a physician and does not provide medical advice, diagnosis, or treatment. Always seek the advice of a qualified health provider with questions about a medical condition. If you think you may have a medical emergency, call 911.