21st November 2019

cdc
14

How long does it take for RSV to not be contagious?

People infected with RSV are usually contagious for 3 to 8 days. However, some infants, and people with weakened immune systems, can continue to spread the virus even after they stop showing symptoms, for as long as 4 weeks.

Accordingly, how long does it take to show signs of RSV?

Almost all children will have had an RSV infection by their second birthday. People infected with RSV usually show symptoms within 4 to 6 days after getting infected.

Can a child get RSV twice?

It is common to be infected more than once, even in the same RSV season; however, subsequent infections are usually milder. (See "Respiratory syncytial virus infection: Clinical features and diagnosis".) Children who are older than two years typically do not develop bronchiolitis but can be infected with RSV.
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