28th May 2023

Patients innately form antibodies to A and B antigens without requiring exposure to foreign blood or blood products

Patients innately form antibodies to A and B antigens without requiring exposure to foreign blood or blood products. For other red cell antigens, such as RhD, patients only produce antibodies following exposure to the antigens.

What of the following would be most likely to cause a patient to produce an atypical (non-ABO) red cell antibody?

Select the SINGLE most appropriate option from the list below. Select ONE option only.