Florida Governor issuing a warning to residents in the Miami area to try and avoid mosquito's.

FOX's Eben Brown has more from Miami:

There's a Miami neighborhood in common with the four people form South Florida who tested positive for Zika infection, but who didn't acquire it outside the continental U.S.

And mosquitoes are now considered the likely cause. It means healthcare providers have to be very careful. Governor Rick Scott:

(Scott) "We'll be working with the FDA and blood establishments in Miami-Dade and Broward counties to test each individual unit of blood collected." 

And they're prompting more personal mosquito control, like using repellent and wearing long clothes.

In Miami, Eben Brown, FOX News.

Follow Eben Brown on Twitter: @FOXEbenBrown