IMPC_HEM_030_001 10^3/ul A white blood cell (WBC) count measures the number of white blood cells in your blood. A WBC differential determines the percentage of each type of white blood cell present in your blood. A differential can also detect immature white blood cells or any abnormalities, both of which are signs of a potential problem. false false false simpleParameter 1.3 false false false Neutrophil cell count false true false FLOAT