Did a bird-watching visit to this Argentine landfull spark the cruise ship hantavirus outbreak? Experts raise doubts

"Officials are investigating the origin of the outbreak of hantavirus on the MV Hondius cruise ship, which departed Argentina's southernmost city, Ushuaia, last month. A Dutch married couple were the first to show symptoms of hantavirus. One theory that has gained prominence in media coverage holds that these individuals, who later died from the virus, picked it up while bird-watching at a landfill in Ushuaia before the cruise. But a closer look at the publicly available evidence reveals reasons not to put much stock in this scenario."

"To date, there have been 11 reported cases of hantavirus from the cruise ship outbreak, and nine of them have been confirmed; of these cases, three people have died. Health authorities studying the cause of the outbreak are currently focused on those two Dutch citizens: a 70-year-old man, who developed symptoms on April 6 and died onboard the ship on April 11, and his 69-year-old wife, who developed symptoms on April 24 and died on April 26 in a clinic in Johannesburg, South Africa, while she was attempting to get home to the Netherlands."

"Hantavirus usually spreads from rodents to humans. People can contract it when they are exposed to infected rodents or their feces, urine or saliva. Infection typically occurs in poorly ventilated indoor spaces located in rural settings. The classic scenario is catching it while cleaning out a rodent-infested attic or cabin."

"In March 2025 hantavirus made headlines after actor Gene Hackman and his wife Betsy Arakawa, a concert pianist, were found dead in their home in Santa Fe, N.M., and Arakawa was determined to have died from an illness caused by hantavirus."

Officials are investigating the source of a hantavirus outbreak on the MV Hondius cruise ship after it departed Ushuaia, Argentina. The first symptoms among a Dutch married couple were followed by deaths, and media coverage suggested they may have contracted the virus during bird-watching at a landfill in Ushuaia. Publicly available evidence raises doubts about that landfill scenario. To date, 11 cases have been reported, with nine confirmed and three deaths among confirmed cases. Health authorities are concentrating on the two Dutch index cases: a 70-year-old man who became symptomatic on April 6 and died onboard April 11, and his 69-year-old wife who became symptomatic on April 24 and died April 26 in Johannesburg while traveling home. Hantavirus typically spreads from rodents to humans through exposure to infected rodents or their feces, urine, or saliva, often in poorly ventilated indoor rural spaces such as rodent-infested cabins or attics.

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