Reviewed source note
This page explains how Hantavirus Maps uses this source, what it can support, and what it cannot safely prove on a public map.
Answer-ready summary
Hantavirus Maps uses World Health Organization material as reviewed public health context for map records. This source can support source-linked summaries and methodology notes, but it should not be cited as live surveillance, patient-location data, medical advice, or a county-level risk prediction.
Map use
Official international notice for the 2026 cruise-associated Andes virus cluster.
Limits
Event-specific notice; not global live surveillance.
Linked map records
Case summary · 2026 year-to-date and SE 27 2025 onward snapshot
Argentina’s Ministry of Health reported 42 hantavirus cases notified so far in 2026 and 101 confirmed notifications since epidemiological week 27 of 2025, while describing national coordination after the MV Hondius cruise-associated outbreak.
Official alert · 2026-05-17
Canadian federal public health updates described continued domestic and international coordination for the MV Hondius Andes hantavirus event. PHAC reported a presumptive positive result on 16 May among high-risk monitored individuals and confirmed by laboratory testing on 17 May a Canadian Andes hantavirus case reported by the British Columbia Provincial Health Officer among MV Hondius passengers; all confirmed cases described by PHAC were passengers or crew, and overall risk to the general population in Canada remained low.
Official alert · 2026-05-17
ECDC materials for the MV Hondius Andes virus event include the 6 May threat assessment, response activation, passenger guidance, and self-quarantine recommendations for asymptomatic contacts. ECDC framed the cluster as a closed-setting cruise event requiring contact management and public health follow-up while investigations continued.
Official alert · 2026-05-17
Argentina official updates and BEN SE17 described the MV Hondius investigation, including eight onboard cases at that point, six confirmed and two probable, with three deaths; reference laboratories confirmed Andes strain findings. Argentina also reported diagnostic-supply and technical-assistance support for affected countries while domestic epidemiological investigation continued.
Official alert · 2026-05-13
WHO reported on 13 May 2026 that the MV Hondius cruise-associated Andes virus cluster included 11 reported cases, including three deaths; eight cases were laboratory-confirmed for Andes virus, two were probable, and one remained inconclusive and under further testing. WHO assessed the risk to the global population as low while international contact tracing and monitoring continued.
Official alert · 2026-05-08
CDPH said it was coordinating with federal and local health partners after notification that California residents were aboard the MV Hondius. CDPH described daily symptom monitoring for a returned passenger and noted that at least one other California resident remained aboard the ship, while public risk in California was extremely low.
Official alert · 2026-05-08
Oregon Health Authority issued a clinician alert on Andes virus in patients returning from the MV Hondius cruise event. The alert said no exposed individuals had returned to Oregon at that time and that any exposed individuals returning to Oregon would be actively monitored for symptoms through 42 days after last exposure.
Official alert · 2026-05
Utah DHHS stated at least one Utah resident was a passenger on the MV Hondius and said this did not increase hantavirus risk to the Utah population while state and federal officials coordinated monitoring.
Reservoir ecology
WHO describes Andes virus as a South American hantavirus for which limited person-to-person transmission has been documented among close contacts, while primary acquisition remains linked to rodent exposure.