Practically overnight, Zika virus has gone from "what's that?" to "oh no, Zika?"
From the justified concerns about birth defects, to athletes declining to participate in the Olympics out of Zika fears, the virus is now a major health issue worldwide.
New York Times science reporter Donald G. McNeil, Jr. cuts through the hype and examines the very real concerns with the disease in his book Zika. The author joins us to help us understand the medical discoveries about the virus.