Mosquito breeding grounds is front line in Zika fight

Aired: 2/3/2016 | 0:05:26 | Clip
The Zika virus has been found in more than 25 countries and at least nine cases have been identified in Florida, prompting the governor to declare a health emergency in some areas. Mosquitoes are the main source, but officials say they are investigating a reported case of sexual transmission in Texas. Gwen Ifill talks to Michael Osterholm of the Center for Infectious Disease Research & Policy.