Blood transfusion not long ago. I'll see if I can find the link.
Just think, sexual orientation is no longer a reason to deny someone the ability to donate blood.
Personally, if I ever needed a blood transfusion, and I hope I never do, would be to take blood ONLY from those I know.
When I had surgery back in 1988 - brain tumor ... explains a lot, right?

- we did just that. Several friends went to the blood bank and made donations toward my surgery, and if not needed, for general use.
Are homosexuals now allowed to donate blood now? I thought they were still fighting to be allowed.
I think the regs regarding blood donations have/had largely cut off that as a vector (though allowing homosexuals to donate would reopen that risk). Another significant vector is needle sharing among IV drug users; promiscuous anal sex is easily the worst vector.