The Importance of Type O
Different ethnic and racial groups also have different frequency of the main blood types in their populations.
For example, approximately 45 percent of Caucasians are Type O, but 51 percent of African Americans and 57 percent of Hispanics are Type O. Type O is routinely in short supply and in high demand by hospitals – both because it is the most common blood type and because Type O negative blood, in particular, is the universal type needed for emergency transfusions.
Minority and diverse populations, therefore, play a critical role in meeting the constant need for blood.
Source: The American Red Cross