Bronchiolitis.

Bronchiolitis is a commonly encountered disease of infants and young children. Mortality is low, but morbidity is significant. Treatment requires considerable commitment of time from medical and nonmedical personnel. Decisions about treatment modalities remain controversial. Patients may remain susceptible to pulmonary problems for years and may be predisposed to the development of asthma. Much is known about this disease, but much remains to be learned.