transfusion practice and their distribution is determined by genetics and environmental
factors. We determined the distribution of ABO and Rh blood group systems among blood
donors in Sokoto, North-Western Nigeria by conducting a retrospective study over a two-
year period (1 st Jan 2012 to 31 st Dec 2013) at Usmanu Danfodiyo University Teaching
Hospital (UDUTH) Sokoto, North-Western Nigeria. Blood donor records were studied for the …