When you have a patient with an antibody, do you antigen type them for the entire antigen group, or just for the specific antibody antigen? At my previous blood bank, if we had an anti-Jka, we would only antigen type the patient and donor for Jka. If we had an anti-c, we would type the patient for c and E. If we got an anti-e, we would type for C and e. At my current blood bank, the policy is to antigen type for the entire group. If a patient has anti-c, they get typed for C, c, E, and e. If they have anti-Jka, they get typed for Jka and Jkb. What do other labs do? And can you direct me to the reference that led you to your policy? Thank you!