GSTM1 and congenital rubella syndrome: The median of minimum white blood cell (WBC), red blood cell (RBC), haemoglobin concentration (Hb) and platelet (PLT) was low in patients with CRS, especially those with severe CRS, and patients with severe CRS received lower WBC (p = 0.019) and PLT (p = 0.009) than those with mild CRS (Table 2).