Patagonia
Southernmost region spanning Argentina and Chile, Andes virus endemic.
On 28 May, WHO reported that monitoring of a shipboard Andes-virus cluster linked to Patagonia was winding down after 13 cases.
Last refreshed: 24 September 2026 · Appears in 1 active topic
Timeline for Patagonia
Stargate and Atlas top Argentina data-centre pipeline
Data Centres: Boom and BacklashMentioned in: Ship hantavirus cluster is winding down
Pandemics and BiosecurityMentioned in: CDC mandates airborne isolation for Andes patients
Pandemics and BiosecurityMentioned in: Andes hantavirus confirmed in Swiss returnee
Pandemics and BiosecurityMentioned in: WHO publishes three Q1 pathogen-family roadmaps
Pandemics and BiosecurityBackground
Across southern Argentina and Chile, Patagonia links the Andes, The Atlantic coast and a sparsely populated landscape marked by severe weather. The region remains relevant to public-health monitoring because Andes virus is endemic there, with rodents serving as its reservoir.
Andes virus warrants separate attention among hantaviruses because close-contact transmission between people has been confirmed. On 7 May, a case linked to the MV Hondius cluster showed why health agencies monitor travel connections from the region as well as local exposure.
Patagonia also matters as a geographical reference point for cross-border surveillance. WHO's 28 May assessment of the shipboard cluster found evidence of a single spillover rather than sustained wider transmission, but it did not remove the need to track exposures associated with an endemic region.
Andes virus keeps Patagonia relevant
On 7 May, a Swiss passenger WHO had left the MV Hondius tested positive for Andes virus, taking the reported cluster to eight cases and three deaths across 23 nationalities. The episode kept Patagonia in view because the region is associated with the virus, rather than because it was the site of a broad regional outbreak.
WHO reported on 28 May that all 13 cases in the cluster had near-identical genome sequences and that its effective reproduction number had fallen to 0.7 on 22 May. That evidence pointed to one rodent-to-human spillover, while the 42-day contact-monitoring period was expected to end around mid-June.
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