Florida investigates 2 more possible local Zika cases

Florida health officials investigating two more Zika infections that may have been spread by local mosquitoes, bringing the total number of suspected local cases to four.
Officials have yet to confirm how the infections were contracted, but any kind of spread between native mosquitoes would be a major change in the course of the disease in the continental U.S.
The FDA has asked all blood donation centers in Miami-Dade, Broward and surrounding areas to stop accepting blood donations until the blood can be tested for the virus.