A Negative (A-)
A negative (A-) is less common and very useful, because it can be given to A and AB patients, both Rh positive and Rh negative.
How common in the US: 6%
Can donate to
A+A-AB+AB-
Can receive from
A-O-
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Key traits
- A antigen, no Rh antigen
- Has anti-B antibodies
- Can donate to A+, A-, AB+ and AB-
- Can only receive from A- and O-
Donating this type
- A- patients can only receive Rh negative blood
- Important for Rh negative mothers, who need special care in pregnancy
- A- donations help patients who have few compatible options
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.