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Inside a two-story brick building in Medellín, Colombia, scientists work long hours in muggy labs breeding millions and millions of mosquitoes. They tend to the insects’ every need as they grow from larvae to pupae to adults, keeping the temperature just right and feeding them generous helpings of fishmeal, sugar, and, of course, blood. Then, they release them across the country to breed with wild mosquitoes that can carry dengue and other viruses threatening to sicken and kill the population of Colombia. This might sound like the beginnings of a Hollywood writer’s horror film plot. But it’s not. This factory is real. And the mosquitoes being released don’t terrorize the local population. Far from it. They’re actually helping to save and improve millions of lives. Learn more at
