Why Andes Virus Is Different: The Person-to-Person Question
ANDV is the only hantavirus with documented human-to-human spread. Here's what the literature actually says.
The MV Hondius, a Dutch-flagged polar expedition vessel operated by Oceanwide Expeditions, departed Ushuaia, Argentina on 1 April 2026 with approximately 150 people aboard — 89 passengers and 61 crew. Within days, what would become the first documented Andes hantavirus cluster on a passenger ship was already incubating among guests returning from shore excursions in the southern Atlantic.
By early May the World Health Organization had been formally notified, the European Centre for Disease Prevention and Control had issued a rapid risk assessment, and the ship was anchored in open water off Praia, Cape Verde, awaiting medical evacuation while authorities refused permission to dock.
Three deaths have been confirmed to date. At least nine cases meet the WHO confirmed-case definition, and contact tracing extends across at least five countries as passengers who disembarked earlier in the voyage — in Saint Helena, Walvis Bay and elsewhere — are sought by national health authorities.
Andes virus (ANDV) is the only hantavirus with documented person-to-person transmission. Incubation typically runs 7 to 39 days. The clinical course is biphasic: a febrile prodrome resembling influenza, followed in a subset of patients by hantavirus pulmonary syndrome (HPS), with mortality historically reported between 30 and 40 percent.
This page is part of the central reference archive maintained by Hantavirus Cruise. Every claim links back to a primary source — WHO Disease Outbreak News, ECDC threat assessments, national public-health bulletins, ship operator statements, and verified passenger accounts.
Where reporting conflicts, we publish the discrepancy rather than choose a side. Updates are timestamped in UTC and the change log for each article is preserved.
