A cruise ship off the coast of Belgium experience a gastrointestinal illness outbreak last week believed to have been caused by norovirus. The ship has already departed on another cruise.

The P&O Iona ship was hit with a 'nightmare' wave of illness, but why does norovirus spread like wildfire on cruises?

One passenger aboard the P&O Iona travelling around the North Sea told Sky News that “people have been dropping like flies” ...