Laboratory test: Blood Regular Test: White Blood Cells WBC:9.98*109/L, Erythrocyte Sedimentation Rate (ESR): 15 mm/h, C-reactive protein (CRP): (−), Procalcitonin(−), T-SPOT(−), Anti-tuberculosis antibody (−),Tuberculin purified protein derivative (TPPD): (−), Chest X-ray(−). Here, CRP is linked to tuberculosis.