title: [A study on the A2/57 type influenza virus isolated from an outbreak among newborn infants].
mesh_terms: D002648:Child; D004196:Disease Outbreaks; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007232:Infant, Newborn, Diseases; D007251:Influenza, Human; D009975:Orthomyxoviridae
keywords: INFANT, NEWBORN/diseases; INFLUENZA/in infancy and childhood