title: Respiratory syncytial virus epidemic.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D004739:England; D005260:Female; D006801:Humans; D066298:In Vitro Techniques; D007223:Infant; D008297:Male; D009976:Orthomyxoviridae Infections / Q000453:epidemiology*; D012136:Respiratory Syncytial Viruses; D012141:Respiratory Tract Infections / Q000209:etiology*