CRP and Middle East respiratory syndrome: WBC: white blood cell, Hgb: hemoglobin, MCV: mean cell volume, PT: prothrombin time, INR: international normalized ratio, APTT: activated partial thromboplastin time, AST: aspartate transaminase, ALT: alanine aminotransferase, ALP: alkaline phosphatase, LDH: lactate dehydrogenase, CRP: C-reactive protein, EBV: Epstein-Barr virus, PCR: polymerase chain reaction, RSV: respiratory syncytial virus, MERS: Middle East respiratory syndrome