A highly contagious norovirus outbreak has been reported on the Ruby Princess cruise ship, affecting 125 passengers and crew members during its voyage from San Francisco to Alaska. The Centers for Disease Control and Prevention (CDC) confirmed that this marks the third norovirus outbreak on Princess Cruises this year. In response to the situation, the ship has docked at Pier 27 in San Francisco for thorough cleaning, while health experts emphasize the importance of taking precautions against norovirus, especially during summer travel.