Outbreak reported during Alaska cruise
More than 100 passengers and about 23 crew members aboard a Princess Cruises ship became ill from suspected norovirus, according to the Centers for Disease Control and Prevention.
The outbreak affected the Ruby Princess, marking the third illness outbreak reported on one of the company’s vessels this year.
Voyage began in San Francisco
The Ruby Princess departed San Francisco on June 12 for a cruise to Alaska and Canada.
The ship was scheduled to return on July 2.
More than two weeks into the trip, CDC officials received a report that the number of sick passengers had reached the agency’s outbreak threshold.
CDC threshold was exceeded
The CDC defines a cruise ship outbreak when 3% or more of passengers or crew report symptoms.
There were 3,032 passengers and 1,144 crew members aboard the Ruby Princess, according to the agency.
Ship docked for cleaning
The vessel was docked in San Francisco on Thursday for disinfection.
Passengers and crew members who became ill were isolated while cleaning and sanitation measures were carried out.
How norovirus spreads
Norovirus is highly contagious and can cause vomiting and diarrhea.
The virus can spread when tiny particles of fecal matter or vomit enter the mouth.
It can also pass through hand-to-mouth contact after touching contaminated surfaces or objects.
Cruise ships face higher risk
Cruise ships can make illness control more difficult because passengers and crew live, eat and gather in close quarters.
So far this year, six other norovirus outbreaks have been reported on cruise ships.
Handwashing remains key prevention
Health officials recommend frequent handwashing with soap and water, especially after using the toilet and before eating.
A spokesperson for Princess Cruises did not immediately respond to a request for comment on what may have caused the outbreak.
