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O-

🌍 Universal Donor

Universal donor - can give to anyone

O negative blood is the universal donor type. With no A, B, or Rh antigens, it can be given to anyone in emergency situations without risk of reaction. Only 7% of the population has this critical blood type.

→ Can Donate To

O+✓ Compatible
O-✓ Compatible
A+✓ Compatible
A-✓ Compatible
B+✓ Compatible
B-✓ Compatible
AB+✓ Compatible
AB-✓ Compatible

O- blood can be donated to 8 type(s).

← Can Receive From

O-✓ Compatible

O- blood can receive from 1 type(s).

Rh Factor

Lacks the Rh factor (D antigen). Rh negative individuals have two negative alleles.

Learn more about Rh factor →

Population Frequency by Ethnicity

Caucasian8%
African American4%
Asian1%
Hispanic4%

Interesting Facts

  • •Universal donor - can donate to ANY blood type
  • •Used in emergency situations when patient's blood type is unknown
  • •Always in high demand by hospitals and blood banks
  • •Very rare in Asian populations (only 1%)
  • •O- mothers may need RhoGAM during pregnancy if baby is Rh+

Educational Information: This information is provided for educational purposes only. Always consult with healthcare professionals for medical advice, blood transfusions, and pregnancy-related concerns.