A norovirus outbreak infects 125 people — 102 passengers and 23 crew — aboard the Ruby Princess, and the vessel is docked in San Francisco for disinfecting after the Centers for Disease Control and Prevention confirmed the cluster.The ship carried 3,032 passengers and 1,144 crew on a 20-day round-trip voyage that left San Francisco for Alaska and Canada on June 12; Princess Cruises isolated sick people and intensified cleaning while officials note not all infected were ill at the same time or during port calls.The Centers for Disease Control and Prevention defines a cruise-ship outbreak as illness affecting 3% or more of passengers; it says this is the third
norovirus outbreak on a
Princess Cruises ship this year and one of seven recent cruise ship outbreaks, and public health officials urge rigorous handwashing with soap and water because hand sanitizer alone is insufficient.