Christo Redentor Border Crossing Closes Temporarily Due to Dengue Concerns

The Cristo Redentor border crossing between Argentina and Chile will be temporarily closed for disinfection following the detection of a suspected Aedes aegypti mosquito, a known vector for diseases like dengue, yellow fever, chikungunya, and Zika. The closure is a preventative measure coordinated between Argentinian and Chilean authorities.

Closure Details

The border crossing will be closed to all vehicle traffic starting at 10:00 AM on Thursday, February 19, 2026. The closure will affect both directions of travel at Uspallata (Argentina) and Guardia Vieja (Chile). The international tunnel will be inaccessible for 24 hours, from 12:00 PM on Thursday, February 19, to 12:00 PM on Friday, February 20, 2026.

Mosquito Detection and Response

The decision to close the border was prompted by the detection of an adult Aedes aegypti mosquito at the Los Libertadores complex. Chile’s Ministry of Health identified the mosquito, leading to the coordinated response with Argentina. The closure will allow for a chemical application to control the presence of the mosquito.

About the Aedes aegypti Mosquito

The Aedes aegypti mosquito is a significant public health concern due to its ability to transmit several viruses, including dengue, yellow fever, Zika, and chikungunya. Unlike some other mosquito species, it thrives in urban environments and reproduces in domestic settings. Its eggs can survive for extended periods in dry containers, hatching when exposed to water, making prevention challenging.

Previous Closures

This is not the first time the Cristo Redentor pass has been closed for disinfection related to the Aedes aegypti mosquito. A similar closure occurred in February of last year as a preventative measure against the spread of vector-borne diseases.

Authorities will provide updates on the reopening of the border crossing as they become available.