Surveillance of respiratory syncytial virus infection: England and Wales 1988-91.
D003430:Cross-Sectional Studies; D004196:Disease Outbreaks; D004739:England / Q000453:epidemiology; D006801:Humans; D015994:Incidence; D011159:Population Surveillance; D018357:Respiratory Syncytial Virus Infections / Q000453:epidemiology*; D012621:Seasons; D014852:Wales / Q000453:epidemiology