A Negative (A−)

People with A Negative blood have A antigens but lack the Rh factor. This type is less common and vital for Rh-negative patients.

Key Characteristics

• Has A antigen on red blood cells.
• Does not contain the Rh factor (Rh negative).
• Found in about 6% of the population.

Compatibility

Can receive from A− and O− donors. Can donate to A−, A+, AB−, and AB+.

Why It Matters

A− is rare and crucial for patients who cannot receive Rh-positive blood, especially in emergencies or for newborns.

Health & Donation Tips

• A− donors are in high demand — donate regularly.
• Ensure your blood is screened and recorded in donor systems.
• Encourage family to learn about Rh compatibility.