O+

O positive

ABO group O · Rh positive
Written by the VitaWhat editorial team · Medically reviewed by Steve Davis · Last reviewed 19 July 2026 · Editorial policy

The most common blood type — no A or B antigens, but Rh (D) positive.

35%
UK population
38%
World population
O+, A+, B+, AB+ (positive types)
Can donate red cells to
O+, O−
Can receive from

Key facts

  • The single most common type in the UK and worldwide
  • O positive red cells can be given to any Rh-positive patient
  • In very high demand because so many people can receive it

Sources & references

  1. NHS Blood and Transplant — Blood types
  2. American Red Cross — Blood types

Related entries

O negativeA negativeA positiveAB negativeAB positiveB negative
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