Eight people in the U.S. have contracted malaria from local mosquitoes—the first such cases in 20 years, signaling that the way malaria spreads across the planet may be altering. With climate change bringing warmer and wetter weather, creating the conditions needed for disease-bearing insects to thrive, there could be more mosquito-borne illnesses. With warming temperatures, mosquito larvae tend to mature faster, and shorten the incubation period for some mosquito-borne infections, including malaria, dengue and chikungunya, meaning that mosquitoes become infected more rapidly than was typical in the past.
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