(02-13-2019, 02:39 AM)Black Aeronaut Wrote: I'm a Type-O as well, but I don't recall if I'm O-Neg or O-Pos. In one way I'm lucky because I can take whatever you throw at me, but in the other, I can provide for whoever needs it.
Um, actually, while O-neg is the Universal Donor, AB-Pos is the Universal Recipient. Type Os can only receive blood from other type Os. Of course that's not taking into account non-ABO or rhesus blood types, but I think the other blood groups need more than one exposure before patients start developing an immune response (unlike rhesus factor where one exposure is enough, or ABO where the response is inborn).