Most people know their blood type—A, B, AB or O—along with whether they are Rh-positive or negative. But these familiar categories (those letters plus "positive" or "negative") represent just two of ...

A rare new blood type has been discovered, so "step aside A, B and O – there's a new player in town", said Gizmodo. So far, the "Gwada negative" blood type has been identified only in one person: a ...

OneBlood officials announced a critical supply shortage of O-positive and O-negative blood, the two most frequently used blood types in emergency medical care. Regional representatives are urging ...

Join the urgent appeal by the Central California Blood Center for O-negative blood donations to save lives in emergencies.

The Cayman Islands Blood Bank is urgently appealing to members of the public with O-negative blood to donate as soon as possible due to ...

As blood banks across the U.S. report dangerously low supplies of O-negative blood (red blood cells), anesthesiologists are calling for increased donation and changes in how hospitals use this ...

You are probably aware of the two main blood group systems: the AB system and the rhesus system. Under the AB system, there are four main blood types A, B, AB and O. And each of these four types can ...

O-negative “universal donor” blood is in chronically short supply in the U.S., raising concerns for emergency care and patient safety. Because anesthesiologists administer up to 60% of blood ...