Health officials think two people in Miami may have contracted the virus from local mosquitoes. So they're spraying pesticide to help stop the virus from spreading into Florida's mosquito population.
Federal and Utah health officials are investigating a case that may be the first instance of Zika spreading from one person to another in ways other than via mosquito bites, sex or the placenta.
A statement of advice for visitors to the Olympics, from WHO, initially said to avoid impoverished areas to reduce the risk of Zika. Does research back it up?