The Andes hantavirus cluster tied to the MV Hondius expedition cruise has not expanded beyond the ship's cohort. The latest CIDRAP and NEJM filings document 10 of the 11 confirmed cases, all passengers on the same vessel; a beacon_bio update May 15 reported no new confirmed cases since. The ship docked in Rotterdam last week and the remaining passengers are in quarantine. [1][2][3][4]

The plain-English version: hantavirus is a rodent-borne lung infection that people catch from dust laced with mouse droppings, urine, or saliva — not from another person. The single exception is Andes virus, the South American strain on the Hondius, which has produced rare person-to-person transmission within tight contact networks. That is exactly what the cruise-ship cohort gave it: a closed cabin community with one rodent exposure on shore. Outside that setting, every U.S. case in 30 years — 890 confirmed by the CDC — has been a one-off, with a 35% case-fatality but no human-to-human spread. [5]

The paper's May 20 brief took the position, via Stanford's Yvonne Maldonado-Salinas, that hantavirus cannot become a pandemic. The Hondius file is the operational confirmation: ten days after docking, the cluster has not jumped to ship contacts, port workers, or local hospitals. The WHO fact sheet stands; the CDC has not changed its no-daily-briefing posture.

-- KENJI NAKAMURA, Tokyo