Hantavirus outbreak on Dutch cruise ship in Andes region as climate fuels rodent spillover

The Dutch-registered cruise ship MV Hondius reported an outbreak of hantavirus among its passengers and crew. Of the approximately 150 people on board, eleven cases were identified – eight confirmed, two probable and one uncertain – resulting in three deaths. The infections were traced to the Andes strain (ANDV), the only hantavirus known to transmit between humans, which originates in the Patagonia region of Argentina and Chile.

The World Health Organization’s May 13 update confirmed the case numbers and highlighted that the majority of hantavirus spillover events occur in Asia and Europe, though Latin American strains can have fatality rates up to 50%. Argentine researchers attribute the recent rise in cases to climate‑driven changes: a severe drought followed by heavy rains expanded rodent populations, increasing the likelihood of virus transmission to humans. Some commentators have portrayed the alerts as a manufactured panic, but health authorities emphasize that person‑to‑person spread remains rare and that climate‑related habitat shifts are raising the overall risk of hantavirus exposure.

The episode underscores how climate change can amplify zoonotic disease emergence by altering rodent host dynamics in the Andes region.