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A review in Science Advances examines why dengue and malaria have followed different global trends as temperatures rise. One modeling study estimated 390 million dengue infections annually, including 96 million symptomatic cases; malaria causes an estimated 282 million cases each year. The review describes how temperature, rainfall and humidity affect mosquitoes, pathogens and human hosts, while urbanization and socioeconomic conditions also shape transmission. It notes that climate can influence where mosquitoes persist, while social and health factors help determine how disease risks develop.

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00:00Malaria rates fell from 79 to 59 cases per 1,000 people at risk between 2000 and 2015.
00:07But Dengue's rise reveals why warming alone cannot explain the gap.
00:12A review in Science Advances examined existing research on these contrasting trends.
00:17It found that climate shapes potential spread, while social conditions helped determine actual risk.
00:23So malaria benefited from better health care, treatments, bed nets, and indoor spraying.
00:27Meanwhile, growing cities provide containers where mosquitoes that spread Dengue can breed.
00:32But cities often reduce natural habitats favored by mosquitoes that spread malaria.
00:37And Dengue mosquitoes typically bite during daylight, making bed nets less effective.
00:42Meanwhile, Dengue has fewer established controls, with emerging tools' widespread impact limited or uncertain.
00:49Yet malaria's gains remain fragile, with rates rising to 64 in 2024.
00:54So the divide reflects more than heat.
00:56Cities and disease control matter, too.
00:59Disclosure.
01:00This video contains stock footage and content created, or enhanced, using AI-assisted tools.

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