Almost 200 passengers on Royal Caribbean’s Ovation of the Seas cruise ship have been sickened with what officials believe is norovirus, according to the line and news reports. That ship can carry almost 6,000 people. The liner left Singapore on November 23, 2017. The outbreak began soon after.

https://foodpoisoningbulletin.com/2017/norovirus-outbreak-royal-caribbeans-ovation-seas/