Most people recover from RSV (respiratory syncytial virus) in one to two weeks. The worst symptoms typically peak around day three to five of illness, then gradually improve. How quickly you bounce back depends largely on your age and overall health, with babies, older adults, and people with weakened immune systems facing longer and potentially more complicated recoveries.
The Typical RSV Timeline
RSV symptoms usually appear two to eight days after exposure. The first signs often look like a common cold: runny nose, sneezing, mild cough, and sometimes a low fever. Over the next few days, symptoms tend to intensify before turning a corner. For otherwise healthy older children and adults, the entire illness runs its course in one to two weeks.
The pattern generally follows a predictable arc. Days one through three bring the initial cold-like symptoms. Days three through five are usually the peak, when congestion, cough, and fatigue feel the worst. From there, most people start improving steadily, though a lingering cough can hang around for weeks after the main infection clears. That persistent cough doesn’t necessarily mean you’re still sick. It’s a common post-viral response as your irritated airways heal.
Recovery in Babies and Young Children
Infants and toddlers often have a harder time with RSV because their immune systems are still developing and their airways are much smaller. Even mild swelling in a baby’s tiny bronchial tubes can cause noticeable breathing difficulty, wheezing, or rapid breathing. For most healthy babies, the illness still resolves within one to two weeks, but the peak period can be more intense and more worrying for parents.
Babies who are hospitalized for RSV typically need help with oxygen and hydration. Most improve with this supportive care and go home within a few days. Premature infants and babies with heart or lung conditions face the highest risk of a prolonged course. One important distinction for parents: even after a baby’s symptoms clear up, they can continue spreading the virus for up to four weeks. That’s worth keeping in mind around other young children or vulnerable family members.
Recovery in Older Adults
Adults over 65 are at higher risk for serious RSV illness. While a healthy adult in their 30s or 40s might experience RSV as a bad cold that clears in a week or so, older adults can develop lower respiratory infections like pneumonia or bronchitis that extend recovery significantly. Pre-existing heart disease, lung disease like COPD, or a weakened immune system all increase the chances of a longer, more difficult illness.
Milder cases in adults typically resolve in one to two weeks. Severe cases last longer, and the post-viral fatigue and cough can persist well beyond the acute infection. People with compromised immune systems also shed the virus for longer periods, remaining contagious for up to four weeks even after feeling better.
How Long You’re Contagious
Most people with RSV are contagious for three to eight days. You can actually start spreading the virus a day or two before symptoms appear, which is part of why RSV moves so easily through households and daycare settings. Once your symptoms are clearly improving, you’re generally near the end of your contagious window.
The exceptions are infants and immunocompromised individuals, who can shed the virus for four weeks or more. RSV spreads through respiratory droplets and can survive on hard surfaces for several hours, so frequent handwashing during the contagious period makes a real difference in protecting others in your household.
Managing Symptoms at Home
There’s no antiviral medication that speeds up RSV recovery. Treatment is about managing symptoms while your body fights the virus. Staying hydrated is the single most important thing, especially for young children who may not want to drink when they’re congested. A cool-mist humidifier can help loosen congestion, and saline nasal drops followed by gentle suctioning work well for babies who can’t blow their noses.
Over-the-counter fever reducers can help with discomfort and temperature control in both children (at age-appropriate doses) and adults. Avoid giving cough suppressants to young children. For adults, rest and fluids do most of the heavy lifting. The cough that lingers after other symptoms resolve doesn’t usually need treatment, though it can be annoying for a few weeks.
Signs That Recovery Isn’t on Track
Most RSV infections resolve without medical intervention, but some cases need professional attention. In babies and young children, watch for rapid breathing, visible effort with each breath (like the skin pulling in between the ribs or at the neck), flaring nostrils, or a bluish tint to the lips or fingernails. Refusing to eat or drink, significantly fewer wet diapers, or unusual lethargy are also red flags. Breathing rates above 60 breaths per minute in infants warrant evaluation.
In adults, difficulty breathing, a high fever that isn’t improving after several days, or symptoms that seem to be getting worse rather than better after the expected peak around day five all suggest the infection may have moved into the lower lungs. Older adults in particular should be monitored closely, since RSV pneumonia can develop gradually and may not announce itself with dramatic symptoms early on.