CD40LG and COVID-19: Although a tendency was observed toward higher virus-specific antibody levels in the severe group for both IgG (mean = 586.32 BAU/mL) and IgM (mean = 206.96 BAU/mL) compared to patients with moderate COVID-19 (IgG mean = 498.69 BAU/mL; IgM mean = 118.32 BAU/mL).