5.3. Clinical Typing of the Confirmed Cases
Mild cases: have mild symptoms, no pneumonia manifestation in chest image;
Common cases: have fever, respiratory symptoms, and pneumonia manifestation in chest image;
Severe cases: comply with any item of the follows. (A) dyspnea, respiratory rate ≥30 times/min; (B) at resting state, finger oxygen saturation ≤ 93%; (C) PaO2/FiO2 ≤ 300 mmHg (1mmHg = 0.133 kPa, PaO2: arterial partial pressure of oxygen, FiO2: fractional concentration of inspired oxygen);
Critical cases: comply with any item of the follows. (A) show respiratory failure and mechanical ventilation is required; (B) present with shock; (C) combine with other organ failure needing Intensive Care Unit (ICU) monitoring and treatment; (D) chest imaging shows multilobe lesions or progress of lesion focus within 48 h ≥ 50%; (E) combine with other clinical conditions requiring hospitalization.