Possessing a rare blood type, Thomas is forced to protect himself from an early age because if an accident occurs, it will be difficult to find a blood donor for him.
People of type A have special characteristics different from those of group O and the rest of the blood group.
Bombay, Rh-null, Lutheran blood groups, Rh negative are classified as rare blood types because the percentage of people who own less than one in 1,000 people.
All blood contains the same basic components: red blood cells, white blood cells, platelets and plasma.