It's a disfiguring disease spread by the bite of sand flies. And there are fears that the Syrian refugee problem is triggering a dramatic increase in cases.
Scientists are making impressive progress in creating a vaccine for Zika. And they're using a new technology that makes vaccine development faster than ever.
A public health campaign to sell Africans on the virtues of orange-fleshed sweet potatoes — bred for higher Vitamin A levels — has helped combat malnutrition on the continent.
Author Donald. G. McNeil Jr. predicts that 2016 will be the worst year for Zika transmission in the U.S. "After this year, a fair number of people will be immune, and ... immunity will grow," he says.