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After scientists confirmed that mosquitoes can transmit yellow fever and other diseases, mosquito control emerged as an important public health measure. Discover how Americans have managed mosquitoes at home and abroad through this selection of items from the NLM collection.

A photo of a white man surrounded by tall grass with a large scoop in hand

Sampling pond water for mosquito larvae, 1924

Courtesy National Library of Medicine

Henry Carter, a yellow fever expert with the United States Public Health Service, collects mosquito larvae. Collecting samples of larvae allowed health officials to monitor the mosquito population and plan their treatment programs appropriately.