This year, nearly 12 million cases of dengue fever have been recorded in the Americas, nearly tripling last year’s total. New research presented at the American Society of Tropical Medicine and Hygiene suggests that nearly a fifth of the world’s dengue burden is linked to climate change, with that share expected to increase significantly in the future. By 2050, climate change could lead to a 60% increase in dengue cases if emissions continue at their current pace. The United States and its territories have also seen a rise in dengue cases, with over 7,200 cases this year, more than double last year’s total.
Researchers found that rising temperatures due to climate change are enabling dengue-carrying mosquitoes to transmit the virus more efficiently. The study analyzed data from 21 countries in Asia and the Americas and found that even with reductions in greenhouse gas emissions, dengue cases would continue to increase. Efforts to mitigate the impact of climate change on dengue include focusing on vaccines and reducing mosquito populations.
Severe dengue infections, which can result in bleeding and even death, account for about 2% of cases. The disease is most common in humid, tropical climates across Latin America. The research underscores the importance of preparing for future epidemics and adapting to the impact of climate change on the spread of infectious diseases.
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