Travel by sea: health considerations.
D017250:Caliciviridae Infections / Q000517:prevention & control / Q000821:virology; D004196:Disease Outbreaks / Q000517:prevention & control; D005759:Gastroenteritis / Q000517:prevention & control / Q000821:virology; D006801:Humans; D007251:Influenza, Human / Q000517:prevention & control; D007876:Legionellosis / Q000517:prevention & control; D029322:Norovirus; D012767:Ships; D014195:Travel