Update: influenza activity--Micronesia, United States.
D004196:Disease Outbreaks / Q000453:epidemiology; D006801:Humans; D009980:Influenza A virus; D007251:Influenza, Human / Q000453:epidemiology* / Q000517:prevention & control; D008849:Micronesia; D014481:United States; D014611:Vaccination