Why this is being watched Andes orthohantavirus is the only hantavirus with documented person-to-person transmission, though spread typically requires close, prolonged contact. WHO and ECDC continue to assess the wider-population risk as extremely low.
The ship
MV Hondius — Antarctic cruise, Atlantic transit
Vessel
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Operator · flag
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Departed
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Arrived
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Death eventConfirmed cluster eventPort of callResidence country
Case line list
Detailed cases reported to WHO/ECDC
Cases with patient-level detail from WHO DON599 (4 May 2026). Additional cases reported between 4 May and 12 May are summarised below — national agencies have not yet released per-patient details.
#
Onset
Sex
Status
Outcome
Location
Notes
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Geographic spread
Residence country of confirmed and probable cases
Cases have returned to or been repatriated to seven countries. Andes virus has the only documented person-to-person transmission of any hantavirus, but transmission typically requires close, prolonged contact.
Polymarket — pandemic odds
Crowd-priced probability of a hantavirus pandemic in 2026
Snapshot of major Polymarket hantavirus markets. Click through for live odds. These are betting-market probabilities, not epidemiological forecasts.
Sources
Primary sources
When sources conflict, prefer WHO and ECDC official assessments. This tracker is unofficial.
Unofficial tracker. hanta2026.org is an independent, source-linked visualization of publicly reported case data for the MV Hondius Andes hantavirus cluster. It is not a medical, public-health, or financial source. For travel guidance, defer to your national health agency. For pandemic probability, defer to WHO and ECDC. Polymarket probabilities are crowd-sourced betting markets, not epidemiological forecasts. Anonymous pageview counts are recorded via Cloudflare Web Analytics — no cookies, no tracking IDs, no personal data, no third-party advertisers.