Blood types

Everyone has a type. You belong to one of four: O, A, B or AB. An additional factor — the ‘Rh factor’ — determines whether your type is positive or negative. Knowing your blood type is important not only because it determines who you can donate blood to, but also who you can receive blood from.

Blood Type Personality: Understanding Ketsueki-gata

Blood Types and Antigens

Visualizing The Most Widespread Blood Types in Every Country

What Your Blood Type Can Mean for Your Health

A, B, O Blood Types

What are the four major blood groups?

A Third of Americans Don't Know Their Blood Type. Here's How to Learn Yours

O-positive (O+) Blood Type

Blood Types - A, B, AB, O, Rh

What does a B+ blood type mean?

Which Blood Type Is Needed the Most? - By

Blood types

Chart: The Blood Type Distribution Around The World