what are some of the most unique blood types?
AB- is rare, but the rarest is A-H as it has only been found in less than a dozen people in the world.
Here's some info on blood types: http://www.rarebloodtypes.org/
I always thought 0- was the more unique but looking at answers im wrong, well there you go, you do learn a new thing everyday! :-)
sorry.. O- O+ is still pretty rare.. and also AB+ or -
O+ I believe is the most rarest type of blood.