Are you evaluating a person who is about to receive an infusion of a blood product?

Are the patient's red blood cells positive for the P-antigen?

Does the patient have protective immunity from a previous infection with Parvovirus B19?

Has the product been irradiated?

Is/Does the patient ...

• immunosuppressed?

• have an immunodeficiency, including advanced HIV disease?

• pregnant?

• have sickle cell anemia?

• have another type of chronic hemolytic anemia?


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