The Food and Drug Administration is recommending all blood donations in the United States and its territories be tested for the Zika Virus.  Similar guidance was already in place for parts of Florida and Puerto Rico. 

The FDA issued its revised guidance Friday.  More than 22-hundred people around the United States have become infected with Zika as of August 17th, and the number is growing.  Infection is a big concern for pregnant women.

The virus is linked to a birth defect that can lead to babies being born with abnormally small heads.