Blood Type Information

Blood comes in different types. Each person has a specific ABO type (A, B, AB, O) and Rh factor (positive or negative).

The most prevalent types of blood are O positive and A positive. The least common types are B negative and AB negative. Only fifteen percent of the population is negative for the Rh factor.

Compatibility chart for red cell transfusion

Patient's blood type	Patient may receive
A+	A+, A-, O+, O-
A-	A-, O-
B+	B+, B-, O+, O-
B-	B-, O-
AB+	AB+, AB-, A+, A-, O+, O-, B+, B-
AB-	AB-, A-, B-, O-
O+	O+, O-
O-	O-

*Hospital policy may dictate differently.

Blood type information

Of the US population	Blood Type	Rh+	Rh-
45% will be	O	38.5	6.5
40% will be	A	34.3	5.7
10% will be	B	8.6	1.4
5% will be	AB	4.3	0.7

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