As the Olympics open this week in Rio de Janeiro, Latin America is still reeling from Zika, the mosquito-borne virus blamed for causing brain damage in babies. The arrival of winter has reduced the threat in Brazil, the country hit hardest by Zika. Tens of thousands of babies may be born with microcephaly — abnormally small heads — or related conditions in the course of the outbreak, researchers warn.

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Zika threat lingers in Latin America