A baby holds her mouth open in a crib

Integrity Urgent Care First Aid Handbook – RSV

Respiratory syncytial virus (RSV) is a very common virus that causes lung and airway infections. In adults and older children, it leads to mild, cold-like symptoms. It can be more serious in young children, particularly premature infants or children born with chronic medical problems, such as heart or lung disease. Infections are most common November – April but can occur at any time.