What is microcephaly? Zika in U.S. sparks questions, fears

Here's what you need to know about the birth defect linked to the Zika virus

From: http://redirect.viglink.com?u=http%3A%2F%2Fwww.cbsnews.com%2Fnews%2Fwhat-is-microcephaly-zika-virus-questions%2F&key=ddaed8f51db7bb1330a6f6de768a69b8