*The following respiratory pathogens were investigated: Mycoplasma pneumoniae, Chlamydia pneumoniae, adenovirus, respiratory syncytial virus, and Coxsackie B-virus specific IgM **Including malignancies and other infectious diseases WBC, white blood cell; hsCRP, high-sensitivity C-reactive protein; LN, lymph node; RUL, right upper lobe; RML, right middle lobe; RLL, right lower lobe; LUL, left upper lobe; LLL, left lower lobe; GGO, ground-glass opacities; SUV, standardized uptake value