Active Hantavirus Outbreaks
Signals are early indications, not confirmed case counts.
No active outbreak signals at this moment.
Notable Recent Outbreaks
MV Hondius cruise ship cluster
Cluster of severe respiratory illness on a Dutch-flagged cruise ship; reported to WHO on 2 May 2026. Three deaths, four confirmed cases, and over 20 contacts under monitoring across multiple countries.
Argentina – Andes virus (Patagonia)
Recurrent seasonal activity in the Patagonia region; PAHO surveillance ongoing. Andes virus is the only hantavirus strain with documented person-to-person transmission.
United States – Four Corners region
Sin Nombre virus remains endemic in the Four Corners region (Arizona, Colorado, New Mexico, Utah). CDC reports a small number of HPS cases each year; case fatality up to ~38%.
How we track hantavirus outbreaks
HantaVirusMap aggregates signals from multiple complementary sources and combines them into a single live view. Every signal is linked back to its origin so you can verify it.
What counts as an outbreak signal
Signal strength rises with corroboration across independent sources and proximity to official confirmation. Pin numbers on the map represent mentions in recent reports — not confirmed case counts.
Recent global picture
Bulk of HPS activity — seasonal Andes virus in Patagonia and Sin Nombre virus in the U.S. Four Corners region.
Puumala virus drives most HFRS reports, with peaks following good seed years for bank voles in Scandinavia.
Hantaan and Seoul viruses dominant; most HFRS from China, the Korean peninsula and eastern Russia.
Frequently asked questions
How often is the outbreak tracker updated?
Signals are pulled continuously from WHO Disease Outbreak News, ProMED-mail, CDC and ECDC feeds, plus a curated set of news sources. The page reflects the latest ingested batch each time you load it.
What's the difference between a signal and a confirmed outbreak?
A signal is an early indication — a news report, a ProMED post, an official notice — that suggests possible activity. A confirmed outbreak is a public-health declaration, usually by a national authority or WHO. We label sources clearly so you can judge the strength of each signal yourself.
Can I get email alerts for new outbreak signals?
Subscribe at hantavirus.pages.dev to receive a short email when significant new signals appear, with a weekly summary if nothing major happens. You can unsubscribe in one click.