CD40LG and tuberculosis: On the first day of admission (June 15, 2024), blood tests showed that C‐reactive protein (CRP) was elevated (51.06 mg/L), erythrocyte sedimentation rate (ESR) was elevated (40 mm/h), tuberculosis (TB) IgG antibody was negative, and mycoplasma IgM antibody was weakly positive, and cefoperazone‐sulbactam was treated with doxycycline.