Key Aspects:
- MSC Poesia has implemented enhanced sanitation procedures following several reports of gastrointestinal illness.
- Guests on the July 20, 2026 sailing have been informed of the outbreak, but there is no official CDC report as yet.
- Eight outbreaks aboard cruise ships have so far been reported in 2026, but none have been aboard MSC Cruises ships.
Guests who boarded MSC Poesia on Monday, July 20, 2026 received notification of a possible gastrointestinal illness outbreak on the ship’s previous sailing, with stronger cleaning and sanitation measures now implemented on the vessel.
In a letter provided to embarking guests and shared on Facebook, the cruise line has explained the situation as well as what guests can do to lower the risk of any contamination.
“We would like to inform you that a small number of guests and crew from the previous sailing reported symptoms of gastrointestinal illness. As a precaution, we have further enhanced our already rigorous cleaning and sanitation procedures throughout the ship,” the letter said.
Those enhanced procedures include more frequent cleaning as well as moving to a crew-served buffet rather than self-service. Guests who debarked the ship on July 20 also witnessed crew members sanitizing elevator buttons, door handles, and other high-contact surfaces.
Extra hand sanitizing stations were also implemented at the entrances to the ship’s main dining restaurants and the buffet.
The notification letter continues with reminders about proper handwashing procedures and a request that guests contact the Medical Center if they experience vomiting or diarrhea. Those medical consultations are complimentary.
MSC Poesia is the first MSC Cruises ship to be offering an Alaska season with 7-night voyages roundtrip from Seattle. The current sailing is scheduled to visit Ketchikan, Icy Strait Point, Juneau, and Victoria, with scenic cruising along Endicott Arm Fjord along the way.
The ship departed Seattle as planned on Monday and there have been no itinerary adjustments announced. In the case of severe outbreaks, such as onboard Star Princess in March 2026 when more than 100 guests reported symptoms, there may be delays between cruises to permit deeper cleaning and sanitizing.
Similarly, Cruise Hive reported about a mid-cruise stateroom deep cleaning on Ruby Princess during a norovirus outbreak in June while the ship was on a 20-night sailing.
Has the CDC Been Notified of Any Outbreak?
At this time, there is no official report of any large-scale gastrointestinal outbreak aboard MSC Poesia. Such reports to the US Centers for Disease Control and Prevention (CDC) are only required when a minimum of 3% of either guests or crew members report symptoms.
MSC Poesia can welcome 2,550 guests at double occupancy and up to 3,605 travelers if fully booked with all berths filled. Also onboard are up to 1,027 international crew members.
If the ship were only sailing at double occupancy at this time, at least 77 guests or 31 crew members would need to report symptoms for a CDC report to be required.
Because the ship is sailing in Alaska and the summer holidays are always busier, it is more likely she is close to her maximum capacity. This would mean a minimum of 108 guest cases would be necessary to trigger a mandatory report.
For the purpose of reporting to the CDC, cases are counted for the duration of a sailing. This means that some guests may be ill early in the cruise while others do not report symptoms until several days later, but the cumulative total is what is considered for reports.
No MSC Cruises Outbreaks in 2026
While there have so far been eight different gastrointestinal illness outbreaks reported to the Vessel Sanitation Program of the CDC to date in 2026, none have been aboard MSC Cruises ships.
Three outbreaks have been aboard different Princess Cruises ships, while Regent Seven Seas and Oceania Cruises have each reported one outbreak.
Lindblad Expeditions’ National Geographic Sea Bird has been struggling with norovirus on multiple sailings between late May and mid-July.
Of this year’s reported outbreaks, the incidents involving Regent Seven Seas and Oceania Cruises were confirmed as E. coli, while seven other official reports have confirmed norovirus as the causative agent.
No laboratory confirmation is yet available from the latest reported National Geographic Sea Bird outbreak, nor has any information been confirmed about the cause of the illness aboard MSC Poesia.
