More than 100 passengers on US cruise ship sick from suspected norovirus

Princess Cruises vessel is docked in San Francisco for disinfecting in third outbreak for company this year

More than 100 passengers and about 23 crew members on a Princess Cruises ship fell sick from suspected norovirus, according to the Centers for Disease Control and Prevention (CDC), marking the third outbreak to hit one of the company's watercrafts this year.

The Ruby Princess vessel set sail on 12 June from San Francisco, bound for Alaska and Canada, with a scheduled return on 2 July. More than two weeks into the journey, CDC officials received a report of an outbreak, which is defined by a threshold of 3% or more of passengers. Aboard the ship were 3,032 passengers and 1,144 crew members, per the CDC.