Risk of infection among seafarers: a prospective seroepidemiological survey of the crew of a passenger cruiser.

Serial blood specimens for various serological examinations were taken from the crew of a passenger ship which sailed on winter cruises. The study covered 3 successive seasons totalling about 150 years of observation. The figures on the rates of infection were compared with data available from the general population. The study revealed no clear evidence of an increased infection risk among the crew.