Zika alarm rises after U.S. sex link, more Brazil birth defects

February 3, 2016 7:31 PM

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GENEVA/BRASILIA The World Health Organization voiced concern on Wednesday over the reported transmission of the Zika virus in Texas by sexual contact, as such infections could make efforts to combat the virus linked to severe birth defects in Brazil even tougher.

The virus that is spreading quickly across the Americas is usually transmitted by mosquitoes. But health officials in Dallas County reported on Tuesday that the first known case of Zika contracted in the United States was a person infected after having sex with somebody who had returned from Venezue...

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