People of any age can catch RSV, and almost all children get an RSV infection by age 2. Most people who are infected experience only mild symptoms or no symptoms at all. However, the following groups are at higher risk for more severe symptoms: -Premature infants -Young children with congenital heart or chronic lung disease -Young children and adults with weakened immune systems -Older adults, especially those with heart or lung disease To stay up to date on the latest information, please visit the CDC website.