Here's a detailed look at the eight main blood types, from the least to the most common, and a special mention of the rarest blood type ... which is the least rare. Read More: Blood Pressure ...

Of the eight main blood types, AB- is the least common, but the rarest type of all is Rhnull, where a person has no Rh antibodies in their blood. Having a rare blood type makes it more difficult ...

But which is the rarest? Here's what to know ... and the absence or presence of them creates "rare blood types." Someone's blood type is considered rare if they lack "antigens that 99% ...