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Before your blood transfusion, the staff will do tests on your blood, including finding out your blood type and checking for "antibodies" that could react to your transfusion in a harmful way. The staff can then give you blood that matches yours as closely as possible to reduce the chance of a reaction. Getting an infection from a blood transfusion is very unlikely. More than 10 tests are done on each unit of donated blood before it can be given to a patient.
Screening and testing of donated blood have made blood transfusion very safe, but may not prevent all problems. If you have ever had a reaction to a transfusion in the past, tell your doctor or nurse right away.
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