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The vaccine against Zika vaccine was developed by the Army, with the government paying for clinical trials, too. Health officials want to be sure drugmaker Sanofi Pasteur doesn't make it unaffordable.
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Travelers infected with the Zika virus in the Caribbean brought it to South Florida multiple times before officials realized it had reached the U.S., an analysis of virus genomes finds.
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The Zika virus continues to impact a small number of pregnant women and their babies in the U.S., and there is no sign of it slowing down. "Zika is here to stay," the CDC's acting director says.
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Scientists predicted that more than 1,000 babies would be born with the birth defect in Brazil last year. That never happened. Why?
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The Zika virus may have infected more than 1 million people in Puerto Rico, including thousands of pregnant women. Doctors are watching babies born to infected moms who don't show birth defects.
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It's a bit of a paradox, but researchers say they need Zika virus to re-emerge this year so they can test vaccines designed to defeat it.
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Puerto Rico has experienced many more cases of Zika virus than the continental U.S. But health and educational services are scarce on the islands for children born with disabilities.
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More than 2,600 pregnant women on the island have tested positive for Zika. While the number of confirmed cases of fetal abnormalities has been small, officials are concerned about long-term effects.
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Pregnant women in South Florida can get free Zika tests through the state's health department. But delays in getting back the results are heightening worries and may affect medical options.
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Health care workers are anxious that Zika is spreading across the country undetected — and worry that the system is ill-equipped to deal with severe birth defects.