IE 11 is not supported. For an optimal experience visit our site on another browser.

4 Zika cases in Florida caused by local transmission, officials say

02:39

Health officials are confirming that four people in South Florida have been infected with Zika, making these the first cases of local transmission in the United States. NBC’s Sarah Dallof reports for TODAY from Miami on what’s being done to help prevent the spread of the virus. (Run time: 2:38)