So, I'm a student in a medical field and there's this propaganda going on for like 5-10 years about donating blood and giving your blood casually just in case someone might need it. And my question is if blood is so praised in the medical field as it is in the pagan rituals, do you guys know if there is any evidence/proof/superstition/thought/idea of blood being used in medicine as it is used in witchcraft (I mean for satanic purposes, not for the people's good)?