Hantavirus Cases Nearly Doubled in Argentina as Experts Blame Climate Change for Surge

Hantavirus cases in Argentina have nearly doubled over the past year, marking the country's highest infection rate since 2018. According to the Argentine health ministry, the current season has seen 101 confirmed cases and 32 deaths, a significant jump from the 57 cases recorded during the same period last year.

Experts attribute this surge to environmental degradation and climate change. Rising temperatures and extreme weather events, such as intense rainfall and droughts, have altered local ecosystems, allowing the long-tailed mouse—the primary carrier of the virus—to thrive in new territories. As human development moves further into rural areas and habitat destruction continues, interaction between humans and infected rodents has increased.

The rise in domestic cases coincides with an international health investigation involving the cruise ship MV Hondius. Authorities are currently tracing the movements of a Dutch couple who traveled extensively through Argentina before dying during an outbreak of the virus on the vessel. The ship is currently en route to Spain's Canary Islands and is expected to dock in Tenerife on Sunday.

The outbreak on the ship has been linked to the Andes strain of hantavirus. While most hantavirus strains are contracted through exposure to rodent feces or urine, the Andes strain is known for its rare ability to spread between humans through close, prolonged contact. This characteristic sparked initial fears of a new pandemic, but global health leaders have been quick to downplay comparisons to COVID-19.

World Health Organization Director-General Dr. Tedros Adhanom Ghebreyesus addressed the citizens of Tenerife directly, reassuring them that the risk of a widespread outbreak remains low. He emphasized that the transmission potential of hantavirus is fundamentally different from respiratory viruses like COVID-19, as it requires much more intimate contact to spread between people.

In Argentina, the geographic spread of the virus is also shifting. Historically associated with the southern Patagonia region, the majority of cases this season have appeared in the country's central region. The province of Buenos Aires has reported the highest concentration, with 42 confirmed infections. Argentine health teams are currently working to analyze rodent populations in areas visited by the deceased travelers to better understand the origins of the recent spike.