What Are the Most Rare Blood Types?

You probably know there are some blood types that are very common, such as type O. But do you know what the most rare blood types are? Find out.

AB negative blood type - NHS Blood Donation

Rarest blood type: Chart and compatibility

Blood Types: What They Are and Mean for Your Health

Answered: Blood Type 16 46 H6 A 13 .37 AB 2 .06 6…

What is more rare O- blood or AB+ blood? - Quora

What is the rarest blood group?

Why Type O Is the Most Common Blood Type

Rare blood types - NHS Blood Donation

Chart: How Blood Type Prevalence Varies Around the World