How To Determine Positive And Negative Blood Types 8 Steps
People with positive Rh factors have positive blood types, whether A+, B+, AB+, or O+. People with negative Rh factors then have negative blood types, e. g. A-, B-, AB-, or O-. The majority of people have Rh positive factors. [4] X Trustworthy Source Mayo Clinic Educational website from one of the world’s leading hospitals Go to source If you have a positive Rh factor, you can receive either Rh+ or Rh- blood during transfusions....