CRP and pneumonia: Unilateral pneumonia appeared more frequently in younger patients (53.7 vs 62.8 years), the onset was slightly later than bilateral pneumonia (8.9 vs 7.8 days) and most of them did not have red flags on their examination (abnormal auscultation, oximetry ≤ 94%) or blood tests ( CRP ≥ 81.5 mg/L, D-Dimer ≥ 520 μg/L, Lymphocytes ≤ 1,000 10e3/L, Fibrinogen ≥ 500 mg/dL) [6, 28].