title: Leads from the MMWR. Update: influenza activity--worldwide.
mesh_terms: D004196:Disease Outbreaks; D014943:Global Health; D006801:Humans; D009980:Influenza A virus / Q000302:isolation & purification; D009981:Influenza B virus / Q000302:isolation & purification; D007251:Influenza, Human / Q000453:epidemiology*