GSTM1 and COVID-19: Comparing the COVID-19 positive G6PD deficient group with COVID negative G6PD deficient group showed that COVID-19 infection significantly increased the total white blood cell count (WBC), lymphocytes count, and absolute neutrophil count (ANC) but did not increase bilirubin level or decreased Hb level or hematocrit (no hemolysis) (Table 1).