If it doesn't matter he may get blood from the vaccinated, unless he got vaccinated and just doesn't care. But there is a new, I believe done by the Japanese, study done that, if I recall right, said that people receiving the blood of the vaccinated can have side effects similar to those vaccinated. I don't know if I seen it here or another blog site, or media source. I probably did save it though. I'll have to look for you.