A hantavirus outbreak aboard the cruise ship MV Hondius has killed three people, with an American oncologist passenger now isolated in a biocontainment unit at the University of Nebraska Medical Center after testing weakly positive for the virus. The doctor, who assumed coordination of the medical response after the ship's physician became ill, described the symptoms and uncertainty passengers experienced during the outbreak.

See all DONs related to this event Read more about Hantavirus Situation at a glance This is the third Disease Outbreak News report on the hantavirus cluster, following the notification to the World Health Organization (WHO) on 2 May 2026 of severe respiratory illness cases aboard MV Hondius, a cruise ship. Since the last DON was published on 8 May, two additional confirmed cases were reported from France and Spain. In addition, there is one inconclusive result for a case in the United States of America.