To determine whether IFN‐γ is a key factor in stimulating neutrophils to secrete BAFF, and considering that the serum IFN‐γ levels in the majority of MG and HC subjects fall within the range of 0–8 pg mL−1, we stimulated neutrophils in vitro using IFN‐γ concentrations within this range. The gene discussed is TNFSF13B; the disease is myasthenia gravis.