[satchmodog9]

Transfusions:
If you have type A blood, you can receive blood transfusions from people with types A and O blood.
If you have type B blood, you can receive blood transfusions from people with types B and O blood.
If you have type AB blood, you can receive blood transfusions from people with types A, B, AB, and O blood.
If you have type O blood, you can receive blood transfusions from people with type O blood only.
If you have Rh-positive blood, you can receive transfusions from people with types Rh-positive and Rh-negative blood.
If you have Rh-negative blood, you can receive transfusions from people with type Rh-negative blood only.

http://www.nlm.nih.gov/medlineplus/ency/article/003345.htm

[pepperdog]

Thank you! That says it pretty clearly doesn't it?