CRP and viral pneumonia: In the univariate analysis, the three types hospitalized influenza-related viral pneumonia patients with IMV had significantly higher neutrophil percentage, C-reactive protein, AST, DD, blood urea nitrogen, pro-B-type natriuretic peptides, and partial pressure arterial oxygen/fraction of inspired oxygen (PaO2:FiO2) levels than the three types hospitalized influenza-related viral pneumonia patients without IMV.