To investigate associations of MHC haplotypes to MDV tumors, we then analyzed all wild type RB-1B-infected chickens (n=88) and their co-housed naïve contacts (n=55) of our cohort for Marek’s disease incidence, tumor incidence as well as the numbers of tumor-containing organs per animal (Figures 2, 3). Here, HLA-C is linked to neoplasm.