When you donate blood, no matter who you are or how you answer the questionnaire, your blood is still screened for certain blood borne pathogens including HIV.
Each and every time Ive donated blood (which I do a couple of times a year) I have to answer a lengthy questionnaire. But at the end of the day, the answers I put down are voluntary. It is not as if a background check is performed to confirm my answers are truthful.
the problem was that back when, they weren’t screening for aids- and i don’t really wanna risk a mistake in screening of known aids patients who give blood- aids is forever- and it’s deadly-