AB Negative is one of the eight main blood types in the ABO blood group system. It is characterized by the presence of both A and B antigens on the surface of red blood cells, while lacking the Rh factor, which makes it a negative blood type. This means that individuals with AB Negative blood can receive blood from all negative blood types, making them universal recipients for negative blood. People with AB Negative blood make up a small percentage of the population, approximately 1% to 2%. This rarity can pose challenges in blood donation and transfusion situations, as there may be fewer available donors. Understanding blood types, including AB Negative, is crucial for safe medical practices and emergency care.