Hundreds of gay men eager to give blood in the act active basic community donations federal heterosexual history infectious major mass policy previous process response rifle seriously shooting unless wake of the Orlando nightclub act active basic community donations federal heterosexual history infectious major mass policy previous process response rifle seriously shooting unless wake have been turned away by blood centers. Despite a act active basic community donations federal heterosexual history infectious major mass policy previous process response rifle seriously shooting unless wake clinic urging people to donate blood, it was prevented by act active basic community donations federal heterosexual history infectious major mass policy previous process response rifle seriously shooting unless wake law from accepting act active basic community donations federal heterosexual history infectious major mass policy previous process response rifle seriously shooting unless wake from gay men who had been sexually act active basic community donations federal heterosexual history infectious major mass policy previous process response rifle seriously shooting unless wake in the past year. The shooting on Sunday morning left 50 people dead and 53 injured, some act active basic community donations federal heterosexual history infectious major mass policy previous process response rifle seriously shooting unless wake . The killer, Omar Mateen, 29, used a semi-automatic assault act active basic community donations federal heterosexual history infectious major mass policy previous process response rifle seriously shooting unless wake to create the carnage, which is now the deadliest act active basic community donations federal heterosexual history infectious major mass policy previous process response rifle seriously shooting unless wake shooting in U.S. history. Mateen, a New York native, supposedly targeted the LGBT act active basic community donations federal heterosexual history infectious major mass policy previous process response rifle seriously shooting unless wake at the club after being angered at seeing two men kissing in Miami. Many in the LGBT community are now protesting against the federal act active basic community donations federal heterosexual history infectious major mass policy previous process response rifle seriously shooting unless wake of barring gay men from donating blood act active basic community donations federal heterosexual history infectious major mass policy previous process response rifle seriously shooting unless wake they had been celibate in the act active basic community donations federal heterosexual history infectious major mass policy previous process response rifle seriously shooting unless wake year. Dr Ryan Stanton said donated blood must be tested for HIV and other act active basic community donations federal heterosexual history infectious major mass policy previous process response rifle seriously shooting unless wake diseases before it could be used. The testing act active basic community donations federal heterosexual history infectious major mass policy previous process response rifle seriously shooting unless wake typically takes about 24 hours. He said: "Anybody who meets the act active basic community donations federal heterosexual history infectious major mass policy previous process response rifle seriously shooting unless wake qualifications, whether homosexual or act active basic community donations federal heterosexual history infectious major mass policy previous process response rifle seriously shooting unless wake , should be able to donate blood." The Atlantic said: "Even after the most deadly act active basic community donations federal heterosexual history infectious major mass policy previous process response rifle seriously shooting unless wake against gay, lesbian, bisexual and transgender people in American act active basic community donations federal heterosexual history infectious major mass policy previous process response rifle seriously shooting unless wake , the built-in homophobia of American public health keeps the country from mounting the most effective possible act active basic community donations federal heterosexual history infectious major mass policy previous process response rifle seriously shooting unless wake ."