Medically reviewed by Amelia MacIntyre, DO There are different blood types: A, B, AB, and O, with each also being Rh-positive or Rh-negative.Knowing your blood type is important for safe blood ...

Your blood type is determined based on specific antigens present in your blood. You can find out your blood type by asking your doctor for a test, donating blood, or taking an at-home blood test. Your ...

Christine Helms does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...