Heatwaves, droughts, floods and storms push up the number of cases, make diseases more severe and hamper people’s ability to cope.
Credit: Mamun Hossain/AFP/Getty
Most studies on the associations between climate change and disease have focused on specific pathogens, transmission methods or the effects of one type of extreme weather. Camilo Mora, a data scientist at the University of Hawaiʻi at Mānoa, and his colleagues scoured the literature for evidence of how ten climate-change-induced hazards — including surging temperatures, sea level rise and droughts — have affected all documented infectious diseases .
The team also identified 1,006 ways in which climatic hazards have led to cases of disease. Many of those involved bringing pathogens and people closer together. Increases in temperature and rainfall, for instance, have expanded the range of mosquitoes and contributed to outbreaks of dengue fever, chikungunya and malaria. At the same time, heatwaves draw more people to water-related activities, leading to a rise in cases of waterborne illnesses, such as gastroenteritis.
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