Each type can also be either Rh-positive (+) or Rh-negative (-), depending on whether they carry the Rh factor protein. Knowing your blood type is critical in emergencies, as receiving the wrong blood ...

Your blood type is based on the combination of antigens and antibodies in your blood. Whether you are donating blood or receiving a blood transfusion, it's important to know your blood type.

Every year, thousands of people in the US die from preventable blood loss after traumatic injuries. Blood transfusions at the scene could change that.

NZ Blood Service's transfusion medicine specialist Richard Charlewood joins Emile Donovan to explain.

Every day, hospitals throughout the U.S. transfuse blood or blood components, such as platelets, to save the lives of people who are in car crashes, and victims of fires and other emergencies.

The county's Whole Blood Transfusion Program began in August and has helped save 19 lives over 6-month period, officials say.