RSV symptoms typically last 7 to 14 days, with the worst stretch falling on days 3 through 5 of illness. Most healthy children and adults recover fully within two weeks, though a lingering cough can stick around beyond that window. How long you’re actually sick, how long you’re contagious, and how long it takes to feel completely normal again are three different timelines worth understanding.
From Exposure to First Symptoms
After you’re exposed to RSV, symptoms typically appear within four to six days. During this incubation period you may feel perfectly fine, but you can actually become contagious a day or two before any symptoms show up. That’s one reason RSV spreads so efficiently through households, daycares, and nursing homes: people pass it along before they even know they’re sick.
What the Illness Looks Like Day by Day
The first couple of days usually feel like a mild cold: runny nose, low fever, mild cough. Things escalate around days 3 through 5, when congestion, coughing, and general misery tend to peak. For most people this is the hardest stretch, especially for babies who can’t blow their own noses and may struggle with feeding.
After that peak, symptoms gradually taper. By the end of the first week, many people notice real improvement. The full illness runs about 7 to 14 days in a straightforward case. A dry, nagging cough can linger for a few weeks after the main symptoms clear, which is normal and doesn’t necessarily mean you’re still infected.
How Long You’re Contagious
Most people with RSV are contagious for 3 to 8 days. That window typically starts a day or two before symptoms appear and extends through the worst of the illness. By the time you’re clearly on the mend, you’re usually no longer spreading the virus.
There are exceptions. Some infants and people with weakened immune systems can shed the virus for four weeks or longer, even after symptoms have resolved. If someone in your household is immunocompromised, it’s worth being cautious about close contact for longer than the standard week.
How RSV Survives Between People
RSV spreads through respiratory droplets and contaminated surfaces. The virus can survive on hard, nonporous surfaces like countertops for up to 7 hours. On softer materials like clothing or cloth, it lasts about 2 hours. On skin, it remains viable for roughly 20 minutes. Regular handwashing and wiping down frequently touched surfaces makes a real difference during the contagious window, especially if you’re caring for a sick child at home.
When RSV Turns Severe
Most RSV infections resolve on their own, but the virus can cause serious lower respiratory complications, particularly in infants, adults over 65, and people with chronic heart or lung conditions. Bronchiolitis (inflammation of the small airways in the lungs) and pneumonia are the most common complications, and both can lead to difficulty breathing, low oxygen levels, and dehydration.
When hospitalization is needed, the timeline shifts. Data from a large study of children hospitalized with RSV found that the median intensive care stay was about 46 hours, though some children remained hospitalized for seven days or more. Recovery from a severe case takes longer than a mild one. Weeks of residual coughing and wheezing are common after bronchiolitis, and some children experience repeated episodes of wheezing for months afterward.
For older adults, RSV can worsen existing conditions like asthma, COPD, or congestive heart failure. The acute illness may last a week or two, but the downstream effects on chronic disease can extend recovery well beyond that.
The Lingering Cough
Even after the fever breaks and congestion clears, many people are left with a persistent cough that can last two to four weeks. This post-viral cough happens because RSV irritates and inflames the airways, and that inflammation takes time to fully resolve. It doesn’t mean you’re still contagious or that something has gone wrong. It’s one of the most common reasons people feel like RSV “won’t go away” even though the active infection has cleared.
In children, post-RSV wheezing is worth monitoring. Some kids wheeze intermittently for weeks after infection, especially those under two. If wheezing interferes with eating, sleeping, or breathing comfort, that’s a sign the airways need more time or support to heal.
When to Test
If you suspect RSV and want a definitive answer, timing matters. RSV tests are most accurate during the first few days of symptoms, because the amount of virus in your nose decreases as the illness progresses. Testing later in the course of illness is more likely to produce a false negative. For most healthy adults, testing isn’t necessary since treatment is the same as for any respiratory virus: rest, fluids, and managing symptoms. Testing is more useful for infants and high-risk individuals where confirming the diagnosis could change medical decisions.
Getting Back to Normal Life
The CDC’s current guidance for respiratory viruses in school settings focuses on a straightforward principle: stay home while you have a fever and while symptoms are at their worst, and return once you’ve been fever-free for at least 24 hours without fever-reducing medication and your symptoms are clearly improving. This applies broadly to RSV along with other common respiratory infections.
For most people, that means returning to work, school, or daycare somewhere around days 7 to 10, once the fever has resolved and congestion and coughing have improved noticeably. The lingering cough alone isn’t a reason to stay isolated, since it can persist well past the contagious period. The practical marker is whether you’re fever-free, breathing comfortably, and feeling functional enough to get through the day.