Type AB blood is one of the four main blood types in the ABO blood group system, characterized by the presence of both A and B antigens on the surface of red blood cells. Individuals with this blood type can receive blood from any ABO type, making them universal recipients. People with Type AB blood can donate to other AB individuals but are considered universal plasma donors due to the absence of anti-A and anti-B antibodies in their plasma. This unique combination makes Type AB blood important in transfusion medicine and blood donation efforts.