Regions of concern (May 2026)
- Argentine Patagonia — Río Negro, Chubut, Neuquén, Santa Cruz
- Southern Chile — Aysén, Los Lagos, Araucanía, Magallanes
- Cruise routes — Antarctic and Patagonian expedition vessels (linked to the MV Hondius cluster)
- Rural areas globally where rodent populations are high
Before you travel
- Check the latest CDC and WHO travel notices.
- Ensure travel insurance covers infectious disease and medical evacuation.
- If immunocompromised or pregnant, consult your doctor about itinerary adjustments.
- Save the contact details for your country's embassy or consulate at your destination.
While traveling
- Avoid dusty cabins, sheds, or rural shelters that show signs of rodent activity (droppings, gnaw marks, nests).
- Do not sleep on the floor in rural buildings; choose elevated, sealed bedding.
- Store food in sealed containers; never leave food out.
- Air out closed buildings for at least 30 minutes before entering.
- Wear an N95 (or better) mask if you must clean rodent waste.
- On expedition cruises, follow all crew briefings about hygiene and isolation protocols.
If you think you were exposed
- Note the date, location, and nature of the suspected exposure.
- Monitor for fever, severe muscle aches, headache, and shortness of breath for up to 6 weeks.
- If symptoms develop, seek medical care immediately. Mention your travel and possible rodent exposure.
- Contact your embassy if you need help locating an English-speaking provider.
For cruise passengers
Following the 2026 MV Hondius situation, several cruise lines updated their protocols. See the 2026 outbreak page for the latest cruise-related guidance and operator responses.
Sources
- CDC Travelers' Health — Hantavirus
- WHO International Travel and Health
- U.S. Department of State country information