Influenza and respiratory syncytial virus surveillance.
D002675:Child, Preschool; D004196:Disease Outbreaks; D004739:England / Q000453:epidemiology; D006801:Humans; D015994:Incidence; D007223:Infant; D007231:Infant, Newborn; D007251:Influenza, Human / Q000453:epidemiology* / Q000821:virology; D018357:Respiratory Syncytial Virus Infections / Q000453:epidemiology* / Q000821:virology; D012621:Seasons; D014852:Wales / Q000453:epidemiology