Virus-blocking insects taking over Vietnamese island

Field trial tests mosquitoes that may stop the spread of dengue

By Beth Mole, 15:17 PM November 19, 2013

WASHINGTON — A tiny island off Vietnam may soon be the first place on Earth where people are completely shielded from dengue, a potentially lethal viral disease that causes painful fevers.

The virus, which threatens a third of the world’s population, spreads by mosquito bites. In April, researchers released dengue-blocking mosquitoes on Tri Nguyen Island, home to around 3,200 people and — for now — dengue. This month, in the latest survey, the modified bugs made up about 65 percent of the isla...

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