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Promising Vaccines Developed Against Zika Virus

In February, the World Health Organization declared the Zika epidemic a global public health emergency. Since then, drugmakers have been working to create vaccines that could protect against it.  Two have proven extremely effective in mouse experiments. One of the drugs is a so-called DNA vaccine, engineered from a single Zika viral protein. The other is a purified inactivated, or killed, virus — the same technology used to make the original polio vaccine. Dan Barouch, a...

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