How are blood types classified

How are blood types classified

Generally speaking, everyone knows that there are four types of blood types: 0, A, B, and AB, which is the so-called [AB0] blood type. This [AB0] blood type was discovered in 1901 by the American Austrian pathologist Ka.rI. Landsteiner, who won the Nobel Prize in 1930 for this major discovery. In fact, these four blood types are only the most common and earliest discovered blood types in humans, and they cannot cover all human blood types, because in 1927 Lang's found the MN type and the Rh type in 1940, and other scientists also discovered Dozens of blood type systems such as S-type, Q-type, E-type, T-type, etc. are used. However, because these blood type systems have been found in very few cases, the [AB0] blood type is still used in the formulation.