Flickr/James Gathany
News of the first U.S. home-grown Zika outbreak is alarming, Tabitha M. Powledge writes: "The U.S. Centers for Disease Control and Prevention has issued its first-ever travel advisory in the United States. It says pregnant women (and women planning conception or who might be pregnant) should stay out of a one-square-mile neighborhood in Miami that seems to be an infection hotspot for the Zika virus." Also, gene-doping at the Olympics? And brain training for dementia?
