Independent surveillance · Editorially reviewed Data last verified: 16 May 2026 · 09:00 UTC
Outbreak files · 1 active · 3 historical

Hantavirus outbreak files

Active and historical hantavirus outbreaks documented in the surveillance network. Each file contains epidemiological timeline, geographic spread, case data, and outcome analysis, with every claim sourced to a primary public health authority or peer-reviewed reference.

Active

MV Hondius cluster

Multi-country Andes virus cluster traced to a Dutch-flagged polar expedition cruise that departed Ushuaia, Argentina on 1 April 2026. Currently under WHO IHR coordination and CDC Level 3 response. The first hantavirus cluster ever recorded aboard a cruise ship.

Confirmed / probable
9
Deaths
3
Countries
14
Days since WHO notice
11

Historical

Epuyén person-to-person cluster

The largest documented person-to-person Andes virus transmission event. Traced through three identifiable generations of transmission. 34 cases / 11 deaths. Source: NEJM 2020 (Martinez et al.)

Yosemite tent cabins cluster

Hantavirus cluster among visitors to Curry Village in Yosemite National Park, traced to deer mouse infestation in signature tent cabin insulation. 10 cases / 3 deaths. Source: CDC EID 2014 (Núñez et al.)

Four Corners outbreak

The first recognized hantavirus pulmonary syndrome outbreak in the Americas. Led to identification of Sin Nombre virus and its reservoir, the deer mouse. 24 cases / 13 deaths. Source: CDC + EID 2011 (MacNeil et al.)

Editorial standards

Every outbreak file is anchored to peer-reviewed publications or primary public health authority reports. Case counts and death numbers reconcile with the CDC Emerging Infectious Diseases journal, the New England Journal of Medicine, WHO Disease Outbreak News, or ECDC bulletins as appropriate. See methodology for our source-tiering framework.