Argentina's Hantavirus surge sparks health warnings ahead of 2026 U.S. World Cup

Argentina is confronting its largest Hantavirus outbreak in years, with the health ministry reporting 101 confirmed infections since June 2025 and 32 deaths, a 10‑percentage‑point rise in mortality. The Andes strain, endemic to the region and carried by the long‑tailed dwarf rice rat, is the dominant variant, and documented cases of limited human‑to‑human transmission have raised concern among experts.

The outbreak gained international attention after an incident on the cruise ship MV Hondius, where eight crew and passengers were infected and three died. Researchers are investigating whether the Andes strain on the vessel facilitated any person‑to‑person spread. While health authorities caution against panic, they emphasize the need for vigilance as thousands of Argentine football fans are expected to travel to the United States for the 2026 World Cup, with major venues such as Dallas and Kansas City highlighted as likely destinations. No official visitor estimates have been released, but past tournaments saw tens of thousands of Argentine supporters abroad.

Despite the heightened risk perception, officials in both Argentina and the U.S. (CDC) stress that the virus primarily spreads through rodent urine, droppings or saliva, and that large‑scale community transmission remains unlikely.