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Climate change increases spillover risk of rodent-borne arenaviruses, study warns

phys.org·Kat Kerlin·28 days ago
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npj Viruses (2026). DOI: 10.1038/s44298-026-00189-2"> Framework for deriving the impact of climate change on the spillover risk for the three New World Arenaviruses (NWAs) in South America. Credit: npj Viruses (2026). DOI: 10.1038/s44298-026-00189-2 Climate change is likely to drive rodent-borne arenaviruses into parts of South America that have never faced these diseases, putting new communities of people at risk, finds a study from the University of California, Davis. For the study, published in the journal npj Viruses , scientists incorporated climate projections, shifting rodent populations, and the risks of human infection into a model to offer an early risk projection for arenaviruses and other diseases in the next 20 to 40 years. "As climate change accelerates, our study shows how the outbreak risk of dangerous New World arenaviruses could ride on shifting rodent populations to reach millions more people across South America," said lead author Pranav S.…

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