Cell type which lacks HLA antigen is -
Class I products of the genes of the major histocompatibility complex (MHC), HLA-A, -B, and -C, are present on viually all nucleated cells. Mature human red blood cells are not nucleated and do not generally have easily detectable HLA antigens, Reff: www.mayoclinin.com
Monocyte
Thrombocytes
Neutrophil
Red blood cell
Immunology