Even though a lot of people think it to be the most spread blood type, A+ is one of the most rare blood types existing, and 0, though a lot of people always considered to be the rarest, turned out to be one of the most spreads. It is very interesting actually, that it had been misinterpreted such a long time. I talked to several doctors and they all told me that fact, because I just found out, that I am a A+-type of blood-woman :). Always good to know which blood type you are, because if it comes to the point you really might need a transfusion you should better be prepared because in such situations there is a lack of time.