Influenza activity in Great Britain.
D003430:Cross-Sectional Studies; D006801:Humans; D015994:Incidence; D009980:Influenza A virus; D009981:Influenza B virus; D007251:Influenza, Human / Q000453:epidemiology*; D012017:Referral and Consultation / Q000706:statistics & numerical data; D006113:United Kingdom / Q000453:epidemiology