I managed to draw blood from another player, and create a bloogbag IV. Did not test the bloodtype (I think I read somewhere that EVERYONE has O+ bloodtype at the moment). I let another player administer the bloodbag IV but nothing changed. The pale/toned down colors I saw in-game did not change. I can not be 100% sure that the other player administered the IV, I did see him equip it and do some kind of animation. He came across as a friendly person, willing to give the bloodbag thing a try.