We do not repeat any antigen typing done by the reference lab. We are looking into alternative sources of reagents at this time because of rising costs. We keep all common antiseras in stock (C,E,c,e,K,k,Fya, Fyb, Jka, Jkb, S, s, M, N and Lea and Leb) WE use commercial antisera for donor screening and patient testing for all common allos when required by SOP, but, we also save plasma from donors and patients with allo-antibodies in frozen alliquots for those times when massive screening is needed. However, we require a confimration using commercial antisera with controls prior to labeling unit as antigen neg.