+++ Please read this entire page! Update at bottom: There seems to be some debate pertaining the differences in package whole blood from a hostpital vs. human to human transfusions. +++
Please consult with a medical professional before following any of this advice. We are merely passing the below as information that has been found or sent to us over the years.
Blood is grouped into four types: A, B, AB, and O. Each type is also classified by an RH factor – either positive ( + ) or negative ( - ). When a blood transfusion is necessary, donor and patient blood must be compatible. If not, the patient’s body will react to the incompatible donor cells, leading to complications, maybe even death.
Your ABO blood grouping and Rh factor are inherited from your parents. Check the chart below to see what percentage of the population shares your ABO grouping.
Possible Blood Transfusion Combinations
This from a reader
I have to clarify your blood compatibility chart. Your data is correct is you are referring to packed red blood cell transfusions (typical in-hospital type). But is you are talking about person to person whole blood transfusions your chart is completely incorrect. As a hospital laboratory tech for 10 years I know what I am talking about. If you want correct information then I will be happy to supply that. But if you do not want to believe me (as on Survivalblog.com) then I do hope that your readers do not attempt a person to person blood transfusion based on your recommendations.
Here is the chart that was sent to me: