As the world warms, making more of the planet comfortable for heat-loving Aedes aegypti, the mosquito’s Goldilocks Zone will expand northward, and to higher altitudes. By 2080, five billion people, or 60 percent of the world’s population, may be at risk for dengue. “The fact is, climate change is going to sicken and kill a lot of people,” said Colin Carlson, a biologist at the Center for Global Health Science and Security at Georgetown University. “Mosquito-borne diseases are going to be a big way that happens.”
