Study finds RSV #1 cause of hospitalization for children under one.
D001988:Bronchiolitis / Q000453:epidemiology / Q000517:prevention & control*; D006760:Hospitalization / Q000706:statistics & numerical data*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D018357:Respiratory Syncytial Virus Infections / Q000453:epidemiology / Q000517:prevention & control*; D014481:United States / Q000453:epidemiology