Blood Types

Blood types were discovered in 1900 and 1901 at the University of Vienna by Karl Landsteiner in the progression of attempting to figure out, why blood transfusions at times initiate death and at other times save a patient. In 1930, he finally earned the Nobel Prize for this discovery.

All humans and many other primates can be typed for the ABO blood group. There are four primary types: A, B, AB, and O. There are two antigens and two antibodies that are mostly responsible for the ABO types. The precise combination of these four components determines an individual's type in most cases. The table below shows the possible permutations of antigens and antibodies with the corresponding ABO type ("yes" indicates the presence of a component and "no" indicates its absence in the blood of an individual).

The RhD System, some people are A+ (A positive), meaning they have the Rh antigen, those who are A- (A negative) do not have the Rh antigen.

84% of the population is Rh positive

I think that now in today’s time scientifical improvements are being made, so now less people are dying, which I personally love the idea of