What is bronchiolitis?

Bronchiolitis is an infection of the lower respiratory tract that usually affects infants. There is swelling in the bronchioles (smaller airways) of the lung, which causes an obstructed airflow.

Seventy-five percent of bronchiolitis occurs in the first year of a baby’s life. Bronchiolitis usually occurs in the winter and spring, and the condition is most common in babies between 2 to 6 months of age. Bronchiolitis is the leading cause of hospitalization among infants.

What risk factors are associated with bronchiolitis?

Risk factors that increase the likelihood that your child may develop bronchiolitis include:

  • exposure to smoke
  • day care attendance
  • having older children in the home
  • not having been breast-fed

How we care for bronchiolitis

Here at Boston Children’s Hospital , we are actively working on research designed to target the identification of genes that underlie susceptibility to RSV bronchiolitis and subsequent