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The Florida Department of Health says it's possible that a Zika infection in Miami-Dade County is not related to travel in a country where Zika is spreading. An investigation is underway.
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Federal and Utah health officials are investigating a case that may be the first instance of Zika spreading from one person to another in ways other than via mosquito bites, sex or the placenta.
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A woman in her 20s infected a man after she returned to New York City from a country where Zika is spreading. Health officials say he got infected through unprotected sexual intercourse.
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Scientists have evidence that the epidemic in Latin America may have started to subside. But the U.S. isn't out of the woods yet.
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Congress is back after its July 4 break, and after a full-throated protest by Democrats over gun control. They are under pressure to provide funding to fight Zika before they leave for the summer.
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Scientists are making impressive progress in creating a vaccine for Zika. And they're using a new technology that makes vaccine development faster than ever.
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Author Donald. G. McNeil Jr. predicts that 2016 will be the worst year for Zika transmission in the U.S. "After this year, a fair number of people will be immune, and ... immunity will grow," he says.
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A new study offers some intriguing clues.
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So far, data suggest that Zika doesn't pose the same risk of neurological defects to babies and children as it does to fetuses in the womb. But doctors don't know the long-term effects of the virus.
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A statement of advice for visitors to the Olympics, from WHO, initially said to avoid impoverished areas to reduce the risk of Zika. Does research back it up?