Zika alarm grows amid U.S. sex link, rising birth defects in Brazil

February 3, 2016 4:12 PM

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GENEVA/BRASILIA Alarm over the Zika virus spread on Wednesday, as public health officials investigated a report that an American had been infected through sexual contact and Brazil said 4,074 cases of infants with severe birth defects could be linked to the virus.

The widening scare comes two days after the World Health Organization (WHO) declared a global health emergency because of the growing number of Zika-linked cases of microcephaly, a condition in which the baby is born with an abnormally small head and an underdeveloped brain.

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