AB Negative (AB-)

AB negative (AB-) is the rarest type. It can donate to AB+ and AB- patients, and can receive from A-, B-, AB- and O-.

Key traits

• A and B antigens, no Rh antigen
• No anti-A or anti-B antibodies
• Gives red cells to AB+ and AB-
• Can receive from A-, B-, AB- and O-

Donating this type

• The rarest type, found in about 1% of people
• AB plasma is the universal plasma
• Each AB- donation is especially valuable

This information is general and does not replace advice from a health professional. Your eligibility is always decided at the donor screening on the day of donation. Rules change, so confirm with the American Red Cross or the blood center where you plan to donate.