Influenza outbreaks--District of Columbia, Iowa, Louisiana, New York City, North Carolina.
D000328:Adult; D004196:Disease Outbreaks / Q000453:epidemiology*; D004219:District of Columbia; D006801:Humans; D009980:Influenza A virus / Q000302:isolation & purification; D007251:Influenza, Human / Q000453:epidemiology*; D007484:Iowa; D008145:Louisiana; D009519:New York City; D009657:North Carolina