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    NIH Director: Zika virus unprecedented

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NIH Director: Zika virus unprecedented

National Institutes of Health Director Francis Collins talks to CNNMoney's Cristina Alesci about how close we are on finding a Zika vaccine, and why funding medical research is a necessary investment for the economy.

NIH Director: Zika virus unprecedented

National Institutes of Health Director Francis Collins talks to CNNMoney's Cristina Alesci about how close we are on finding a Zika vaccine, and why funding medical research is a necessary investment for the economy.