Blood Types: Main Groups, Most Common, and Rarest

There are eight blood types, divided into four categories: A, B, AB, and O, and whether Rh positive or negative. These types are determined by antigens on red blood cells. Learn what this means.

How to Find Out Your Blood Type Easily – Blood Type Chart & Facts

Blood Types: Main Groups, Most Common, and Rarest

Blood types - NHS Blood Donation

What is the rarest blood type?

Blood types

About Blood New Zealand Blood Service

most common blood type –

Blood Types: Main Groups, Most Common, and Rarest

The Rarest Blood Types in the World (and Percentages of the Population That Has Each) - A-Z Animals