125 Passengers and Crew Hit by Norovirus Outbreak on Cruise Ship Returning to San Francisco A major health incident has been reported aboard the cruise ship Ruby Princess after 125 passengers and crew members were affected by a highly contagious norovirus outbreak during a 20-day voyage between San Francisco, Alaska, and Canada. According to U.S. health authorities, 102 passengers and 23 crew members developed symptoms of gastrointestinal illness, including vomiting, diarrhea, and stomach pain.