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Geovane Silva holds his son Gustavo Henrique, who has microcephaly, at the Oswaldo Cruz Hospital in Recife, Brazil, January 26, 2016. Health authorities in the Brazilian state at the center of a rapidly spreading Zika outbreak have been overwhelmed by the alarming surge in cases of babies born with microcephaly, a neurological disorder associated to the mosquito-borne virus.  Picture taken on January 26, 2016. Ueslei Marcelino / Reuters
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