Whose discovery first demonstrated that mosquitoes carry dengue fever?

Dengue fever was eventually recognized as a mosquito-borne disease through the work of tropical disease researchers in the early 1900s. As with malaria and yellow fever, the key insight was that the illness spread through insect bites rather than direct person-to-person contact. This discovery changed how cities approached sanitation, standing water, and mosquito breeding sites. It also helped frame dengue as a major public-health challenge in tropical and subtropical regions. Modern control efforts still rely heavily on mosquito management because no single measure eliminates the disease everywhere.