So I _think_ for A+, you're looking at just a straight forward whole blood donation -- this is the easiest sort, and you can only do it every 8 weeks. If you'r

So I _think_ for A+, you're looking at just a straight forward whole blood donation -- this is the easiest sort, and you can only do it every 8 weeks. If you're one of the universal donor types (O and AB), they sometimes prefer to do a double-red or plasma donation, which can be done every 16 or 4 weeks. I believe platelets can be donated every week or two, but I don't know if there's a preferred blood type for those.