Senators call for end of gay blood ban

The time is past due for the Food and Drug Administration to lift a lifetime ban on blood donations from men who have had sex with men since 1977, according to a letter from 18 U.S. senators to FDA Commissioner Margaret Hamburg.

"Not a single piece of scientific evidence supports the ban," said Sen. John Kerry, D-Mass. The agency, in an statement, said the policy "is based on current science and data and does not give weight to a donor's sexual orientation."

Check out the FDA's official policy on blood donations from men who have sex with other men here.