Tainara Lourenco, 21, who is five months pregnant, sits on the stairs inside the house of a relative in a slum of Recife, Brazil, February 7, 2016. The Zika virus, linked to thousands of birth defects in Brazil, is primarily transmitted through mosquito bites, but word surfaced this week of infections through sex and blood transfusions. (Photo by Nacho Doce/Reuters)
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