How many hantavirus cases are there in 2026?

Live counts for the MV Hondius cluster (confirmed cases, suspected cases, deaths, affected countries) are shown on the homepage and refresh hourly from D1. The cluster is unusual not for raw case count but for its multi-country footprint via cruise ship travel — passengers from over 20 nationalities disembarked in multiple ports, requiring international contact tracing. Beyond the Hondius cluster, sporadic background hantavirus cases occur annually in endemic regions: typically 20-40 cases/year in the USA (Sin Nombre), 100-200 in Argentina (Andes), several thousand HFRS cases across Eurasia (Puumala, Hantaan, Seoul).