Delhi’s surge of Culex mosquitoes comes at a time when public health officials are declaring notable victories against other kinds of mosquitoes, including the Anopheles genus that transmits malaria. While those gains have saved lives, the situation, mosquito experts say, is complicated: The very changes that have reduced Anopheles’ numbers may be allowing other species to thrive. And amid a changing climate, mosquitoes have found new niches to exploit, especially in urban areas.
Over the past few decades, malaria’s global footprints have diminished, thanks in part to interventions such as mosquito nets and insecticides used to target Anopheles. In India, such interventions have been implemented with the help of a
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