摘要：A number of recent reports from the Northern Hemisphere have drawn attention to theoccurrence of summer outbreaks (May to August) of influenza A among cruise ship passengersand their contacts. In cases amongst passengers returning to Canada from Alaska, exposureappears to have occurred during the land-based Alaskan tour with illness developing during thesubsequent cruise. A late summer outbreak of influenza A among passengers and crew on thereturn leg of a 14-day Sydney-New Zealand-Sydney cruise is reported in this article
