Influenza in travellers to Alaska, the Yukon Territory, and on west coast cruise ships, summer of 1999.
D000413:Alaska; D002170:Canada / Q000453:epidemiology; D004196:Disease Outbreaks / Q000517:prevention & control*; D006801:Humans; D015994:Incidence; D009980:Influenza A virus; D007251:Influenza, Human / Q000453:epidemiology* / Q000517:prevention & control; D011159:Population Surveillance / Q000379:methods; D012767:Ships; D014195:Travel; D015874:Yukon Territory