Andes hantavirus outbreak on expedition cruise ship MV Hondius: 13 cases, 23% fatality rate, multi-country response underway

An outbreak of Andes orthohantavirus (ANDV) has been linked to the Dutch-flagged expedition cruise ship MV Hondius, with 13 cases (12 confirmed, 1 probable) and a 23% case-fatality rate reported as of June 18, 2026. The outbreak affected individuals from 23 nationalities, with ca