Ordinarily, I’m leery of genetically engineering animals, let alone releasing them into the wild. But in the case of dengue- and Zika- bearing mosquitoes, I’ll make an exception.
“750 million genetically engineered mosquitoes approved for release in the Florida Keys“
Out of Babel 
Saw that. Worth a try I think.
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Yeah, given that they’ve been working on this for ten years, and given how fast mosquito generations go, I expect that if there were unforeseen effects they’d have found them by now. And this would be an alternative to spraying!
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