Latest hantavirus outbreak news, reports and updates from CDC, WHO, ProMED-mail and state health departments. Last updated:
CDC formally concluded its hantavirus response on June 24, 2026, after the 42-day quarantine for American cruise-ship passengers ended. No U.S. cases of Andes virus were confirmed; 12 confirmed and 1 probable case and 3 deaths were recorded aboard the MV Hondius internationally.
CDC Acting Director Brendan Jackson confirmed the successful conclusion of the public health response to the MV Hondius outbreak. All 42-day monitoring periods for U.S. citizens with potential Andes virus exposure were completed, with no hantavirus disease detected among monitored individuals.
On June 21, all U.S. citizens potentially exposed to hantavirus aboard the M/V Hondius finished their 42-day monitoring period with no hantavirus disease occurring in the United States as a result of the outbreak.
The European Centre for Disease Prevention and Control confirmed 13 total cases (12 confirmed, 1 probable) tied to the MV Hondius Andes hantavirus outbreak as of June 17. Identified contacts were completing quarantine periods with further spread considered very unlikely.
A joint CIDRAP and NEJM Evidence Public Health Alerts report detailed 10 of the 11 Andes hantavirus cases aboard the MV Hondius, documenting the first passenger-to-passenger transmission event. Three of the 10 patients died and two remained hospitalized.
CDC's updated HAN Health Update confirmed that as of May 18, no confirmed cases of Andes virus associated with the MV Hondius outbreak had been reported in the United States. The update also expanded clinician guidance on testing for Andes virus and other hantaviruses.
CDC announced May 14 that 41 people across the U.S. were being monitored for hantavirus symptoms. They included quarantined passengers at Nebraska Medicine and Emory University Hospital, passengers who returned home early, and contacts of symptomatic passengers on flights.
CDC Incident Manager Dr. David Fitter confirmed there were no hantavirus cases in the United States at the May 13 briefing. No federal or state quarantine orders had been issued, and all contacts were voluntarily monitoring themselves under a 42-day protocol.
CDC issued a HAN Health Advisory alerting clinicians and health departments about the MV Hondius Andes virus cluster. As of May 8, WHO had reported 8 cases including 3 deaths. CDC deployed a team to the Canary Islands and began coordinating repatriation of American passengers.
WHO's Disease Outbreak News reported 8 cases (6 laboratory-confirmed as Andes virus) and 3 deaths aboard the MV Hondius as of May 8. Evidence pointed to human-to-human transmission onboard, with international contact tracing underway across 23 countries.