A norovirus outbreak has affected the German cruise ship AIDAdiva, with 95 passengers and 6 crew members reporting symptoms of the highly contagious gastrointestinal illness. The cases were first reported to health authorities on November 30, making this the eighth day of active infection on board as of December 7, and ruining a holiday of a lifetime for many. The ship, operated by AIDA Cruises (a subsidiary of Carnival Corporation), is carrying 2,007 passengers and approximately 640 crew members. According to the US Centers for Disease Control and Prevention (CDC), the infected individuals represent fewer than 6 per cent of...