Ruby Princess experienced a confirmed norovirus outbreak during its most recent Alaska sailing.
With 102 passengers and 23 crew members reporting gastrointestinal symptoms including vomiting and diarrhoea, the illness reports exceed the 3% threshold required for reporting to the US Centers for Disease Control and Prevention’s Vessel Sanitation Program, which monitors all such outbreaks on cruise ships visiting US ports.
The 113,561-gross-ton Ruby Princess departed San Francisco on Friday, 12th June 2026.
With 102 passengers reporting illness, around 3.4% of guests were affected during the voyage. Among the ship’s 1,144 crew members, 23 also became ill, representing around 2% of the crew.
The combined total of 125 cases triggered formal CDC reporting requirements.
Timeline Of Illness Reports
The 125 reported cases did not occur simultaneously throughout the sailing.
Given the extended 20-night itinerary, some guests and crew became ill during the early stages of the cruise, while others developed symptoms later in the voyage.
Under the CDC’s Vessel Sanitation Program, outbreak reports are based on the cumulative number of illness cases recorded over the entire voyage rather than the number of people ill at any one time.
This is the standard method used to monitor gastrointestinal illness aboard cruise ships operating in US waters.
Alaska Itinerary And Ports Of Call
During the cruise, Ruby Princess visited a number of popular Alaska destinations including Ketchikan, Wrangell, Juneau, Skagway and Valdez.
The itinerary also featured scenic glacier cruising, one of the highlights of extended Alaska sailings during the summer season.
These longer voyages allow passengers to explore a wider range of destinations while taking advantage of Alaska’s extended daylight hours.
Voyage Completed And Ship Returns To Service
Ruby Princess returned to San Francisco as scheduled on 2nd July, with passengers disembarking as planned.
Following the end of the voyage, the ship underwent enhanced cleaning and sanitation procedures before departing on its next scheduled cruise on 2nd July.
Princess Cruises continued normal operations throughout the outbreak while implementing additional health measures designed to limit further transmission.
Enhanced Cleaning And Sanitation Measures
After illness cases were identified, crew members immediately introduced enhanced sanitation protocols across the vessel.
These measures included more frequent cleaning of public areas and high-touch surfaces throughout the ship.
Samples collected from affected passengers and crew later confirmed norovirus as the cause of the outbreak, allowing the ship’s medical team to implement appropriate containment procedures.
The CDC’s Vessel Sanitation Program monitored the outbreak response throughout the voyage to ensure sanitation standards were maintained.
Changes To Dining And Hygiene Protocols
Passengers
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