what is special about o- blood
O Negative. As an O Negative blood donor you have a particularly unique opportunity to help people in emergency situations. O Negative blood cells are called âuniversalâ meaning they can be transfused to almost any patient in need, and only 6.6% of the population has O Negative blood. In the event of an emergency, trauma patients and accident victims are given a fighting chance at life due to O Negative blood transfusion. You may hear that âO Negative blood is the type they carry on the medical helicoptersâ. This is often the case when there is no time to ask questions. Additionally, O Negative red blood cells are safest for newborn infants with under-developed immune systems.