2. Infants and Young Children

Respiratory syncytial virus can be severe in infants and young children. Most of the time, the symptoms are mild, but it can progress to more complicated respiratory infections like pneumonia or bronchiolitis. One to 2% of infants under six months old who develop RSV require hospitalization. The virus hits newborns and young infants particularly hard and is the number one cause of lower respiratory illnesses.

infant newborn risks Milos Dimic / Getty Images

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