
The Canadian Blood Services is now accepting gay men as donors of stem cells and bone marrow. Until October, gay men were automatically ineligible if they'd ever been sexually active. Bone marrow and stem-cell transplants from non-relatives are uncommon; in 2008, just 250 such operations were performed in Canada. That's because, for the procedure to work, donors and recipients must be near-perfect genetic matches. (
Xtra.ca)