Respiratory Syncytial Virus Infection (RSV)

What is it?

Respiratory Syncytial Infection, or RSV, is a common respiratory virus that usually causes mild, cold-like symptoms.

RSV is the most common cause of bronchiolitis (inflammation of the small airways in the lung) and pneumonia (infection of the lungs) in children younger than 1 year of age in the United States. RSV can also make chronic health problems worse. For more information, visit the Centers for Disease Control and Prevention RSV webpage.