The performed analysis showed a negative correlation of the percentage (R = −0.78; p < 0.05) (Figure 3) and the number (R = −0.69, p < 0.05) of CD19+ TLR9+ B cells with the level of glycated hemoglobin in a group of patients with newly diagnosed type 1 diabetes. The gene discussed is TLR9; the disease is type 1 diabetes mellitus.