A National Geographic Sea Bird cruise, operated by Lindblad Expeditions, has suffered its third gastrointestinal illness outbreak in around two months, prompting the US Centers for Disease Control and Prevention to open a review. The repeated outbreaks on the same vessel raise questions about the effectiveness of sanitation measures aboard the ship and could affect confidence among passengers on future Alaskan voyages.

The CDC's Vessel Sanitation Program detailed the latest incident in a report dated 15 July, noting that the outbreak was reported on 12 July, roughly halfway through a voyage running from 10 to 15 July between Sitka and Juneau, Alaska. The article does not specify the exact number of people affected or the illness's cause, though it notes this marks a pattern of repeated outbreaks on the same ship within a short timeframe.