UKBBv2 array genotyping significantly increases the number of available units for patients with multiple RBC antibodies. (A) The number of alloantibodies identified in patient samples, with the number of patients and antibodies on the vertical and horizontal axis, respectively. (B) Average increase in the number of compatible donors when using UKBBv2 array instead of clinical typing data to identify compatible donors, cataloged by the number of RBC alloantibodies identified in patient samples. (C) The increase in the number of compatible donors when using the UKBBv2 array instead of clinical typing data for each complex alloantibody profile identified in the data from 3146 patients with RBC alloantibodies.