Question

if blood is in short supply, which blood type would be the most beneficial to have on hand if someone needed a blood transfusion? o+ o- ab+ ab-

Explanation:

O - blood type is known as the universal donor. It can be transfused to people with any blood - type (A, B, AB, O) and positive or negative Rh factor. So when blood is in short supply, having O - on hand is most beneficial for transfusions as it can be used for the widest range of patients.

Answer:

O -