Regional Risk Focus
- travel exposure
- cross-border alerts
- cluster surveillance
Countries: Argentina, Chile
Patagonia Andes Virus Timeline
Chronology of the 2026 Patagonia-linked Andes virus cluster and cross-border response updates.
First reported onset in the cluster
WHO reported the earliest known illness onset in the linked outbreak investigation window.
Cruise-linked cluster escalates
Investigation expanded to a multinational passenger and crew cohort with cross-border contact tracing.
WHO Disease Outbreak News published
WHO issued formal outbreak communication and response guidance for authorities and travelers.