Active outbreaks

Dutch-flagged expedition cruise with 147 aboard (88 passengers + 59 crew, 23 nationalities). Seven cases (two PCR-confirmed + five suspected) including three deaths. Andes hantavirus confirmed; vessel currently moored off Cabo Verde and headed for the Canary Islands. Affected states: Cabo Verde, Netherlands, Spain, South Africa, United Kingdom.

17 confirmed HPS cases reported year-to-date through MMWR week 17 of 2026. Cases concentrate in the Four Corners region (Sin Nombre virus) with smaller numbers from the Gulf Coast (Bayou virus).

Netherlands is among the five affected states per WHO DON599 (multiple Dutch nationals were aboard the MV Hondius). National IHR Focal Point coordinating contact tracing of disembarked passengers and evacuees.

Spain is among the five WHO-named affected states; the MV Hondius is heading to the Canary Islands for disembarkation. Spanish authorities preparing port-of-entry response and contact tracing.

Disembarked Dutch passenger admitted to a Johannesburg hospital where she died. South Africa NICD coordinating with WHO and the National IHR Focal Point.

UK is among the five WHO-named affected states. UKHSA monitoring travelers connected to the MV Hondius cluster; assessment of risk to the UK public is very low.

Argentina reports approximately 60–110 confirmed HPS cases per year, concentrated in southwestern Patagonia (Chubut, Río Negro, Neuquén) and the northwestern provinces. Argentina is the only country with confirmed person-to-person Andes transmission. Numbers shown reflect the Argentine Ministerio de Salud annual baseline; current weekly counts available from the boletín integrado.

Chile reports approximately 50–80 confirmed Andes hantavirus cases annually with seasonal peaks in summer (December–March). Aysén and Los Lagos consistently report the highest incidence per capita. Annual baseline; verify current week at ISP Chile.

Brazil reports approximately 80–150 confirmed HPS cases annually, with the highest incidence in southern and central-western states (Mato Grosso, Paraná, Rio Grande do Sul). Dominant strains vary by region.

Germany reports a strongly cyclical Puumala virus burden — peak years exceed 2,000 cases (e.g., 2012, 2017, 2019), trough years <300. Bavaria and Baden-Württemberg contribute the bulk. Cases are notifiable; verify current weekly counts at RKI SurvStat.

Finland reports the highest per-capita Puumala virus incidence in the world — approximately 1,000–3,000 confirmed cases per year (locally myyräkuume). Severe disease is rare; most patients recover with conservative management.

China reports more hantavirus cases than any other country — typically 10,000 to 20,000 confirmed HFRS cases annually depending on the cycle phase. Hantaan virus dominates in agricultural regions; Seoul virus in port cities. China uses a bivalent inactivated Hantaan/Seoul vaccine in high-incidence rural counties.

South Korea reports approximately 300–600 confirmed HFRS cases annually, concentrated in Gyeonggi, Gangwon, and Chungcheong provinces. The disease (Korean hemorrhagic fever) gave its name to the prototype Hantaan virus. KDCA uses inactivated Hantaan vaccine in high-risk military and rural populations.

Russia reports several thousand confirmed HFRS cases annually, dominated by Puumala virus in the Volga region (Bashkortostan being a notable focus) and Dobrava-Belgrade in the south.