Newsweek."The discriminatory restrictions against blood donations by healthy gay and bisexual Americans have persisted for far too long; the steps you have taken acknowledge current rules are informed more strongly by bias than science," the letter reads.Citing a 2014 study from the University of California, Los Angeles School of Law Williams Institute, the letter says that getting rid of the donor prohibitions against gay and bi men would "produce over 2 million additional each eligible blood.