Blood group O is the most common blood group. Almost half of the UK population (48%) has blood group O. Receiving blood from the wrong ABO group can be life threatening. For example, if someone with group B blood is given group A blood, their anti-A antibodies will attack the group A cells. read more
The most common type is mammal blood which includes humans, squirrels, sheep and hedgehogs. Then we have reptile blood which includes slow worms, tortoises and adders. Finally we have bird blood which includes tits, shags and peregrine falcons. read more
Type AB-positive blood is called the universal recipient type because a person who has it can receive blood of any type. People over age 69 receive half of all transfusions of whole blood and red blood cells, according to the National Blood Data Resource Center (NBDRC). read more