Cruise ship hantavirus scare revives memories of deadly Argentina ‘super-spreader’ outbreak
A recent hantavirus outbreak on the cruise ship MV Hondius has prompted comparisons to a deadly 2018 ‘super-spreader’ event in Argentina’s Epuyen village, where 11 deaths occurred after a single infected attendee spread the virus at a birthday party. Argentine scientists found human-to-human transmission peaked on the first day of fever symptoms and that isolation measures were critical in containing the outbreak, with WHO now emphasizing low public risk for the current cruise ship cases.
A 2018 hantavirus outbreak in Argentina’s Epuyen village, involving 33 infections and 11 deaths, has drawn parallels to the recent MV Hondius cruise ship case after a 68-year-old resident likely contracted the Andes strain from rodent exposure. The virus spread during a 90-minute birthday party attended by around 100 people, with three ‘super-spreaders’—including a man who infected six others due to his social activity—accounting for two-thirds of cases. Transmission occurred primarily through inhaled droplets, with symptoms critical to spread timing, as over half of infections were linked to the first day of fever onset. Argentine researchers analyzed samples from the outbreak, revealing that close contact—such as sitting within a meter of the first patient—led to infections, while a brief bathroom encounter resulted in no transmission. Despite over 80 healthcare workers interacting with symptomatic patients without strict precautions, none contracted the virus, suggesting early isolation and quarantine measures were effective in curtailing spread. Olivier Blond of Conicet noted that selective respiratory isolation in Epuyen ‘preserved the health of the entire region’ by preventing wider transmission. The current MV Hondius outbreak has resulted in three deaths, including a Dutch couple who visited Argentina before boarding, with two confirmed cases in Johannesburg and Zurich and three suspected cases evacuated from the ship. The World Health Organization (WHO) has stated the public risk remains low, emphasizing that the Andes strain differs from COVID-19 by not causing a pandemic. WHO expects the cruise ship outbreak to be limited if countries adhere to public health protocols, including isolation for exposed contacts. The 2018 study in the *New England Journal of Medicine* highlighted that symptomatic patients’ isolation and contact tracing were key to containing the Epuyen outbreak. The findings underscore the importance of rapid response in limiting hantavirus spread, a disease endemic to Argentina but rare elsewhere. Current containment efforts on the cruise ship mirror those used in Epuyen, with WHO urging vigilance to prevent further cases.
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