1. Onset of illness in the community | |
2. Clinical manifestations | |
• Recent cough, expectoration, or the aggravation of symptoms of original respiratory diseases, with or without purulent sputum, chest pain, dyspnea, and hemoptysis | |
• Fever | |
• Signs of pulmonary consolidation and/or moist rales were presented | |
• Peripheral white blood cell counts > 10×109 / L or < 4×109 / L, with or without left shift of nucleus | |
3. New patchy infiltrations, pulmonary consolidations, “ground-glass,” or interstitial changes are shown in chest imaging, with or without pleural effusion. |