Brazil marshalls GM mosquitoes to battle deadly dengue fever


The small, sun-scorched neighborhood of Itaberaba in this city in Bahia state is the leading testing ground for a controversial effort to combat dengue fever, the harrowing disease that kills 22,000 people a year worldwide. Scientists backed by the state government are releasing millions of the engineered mosquitoes into the wild with the goal of exterminating the species here — and, perhaps eventually, the entire country or world.

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