1. First diagnosis of novel coronavirus infection 2. Epidemiological history Travel history or residence history of Wuhan City within two weeks before the onset of illness, or patients who have had fever from Wuhan with respiratory symptoms within 14 days before the onset of illness, or have cluster Onset, 3. Clinical manifestations: (1) fever, (2) with the following imaging characteristics of pneumonia, early lesions are limited, showing patchy, subsegmental or segmental ground glass shadows, with or without thickening of lobular septum, progression Increased lesions and expanded scope, involving multiple lung lobes, some lesions consolidation, coexistence of ground glass shadows and consolidation shadows or strip shadows, diffuse lung lesions in severe stages, a few of which show white lung , mainly consolidation , Combined with ground glass shadow, multiple cord shadow, air bronchus sign. Pleural effusion or lymphadenopathy are rare, (3) The total number of white blood cells is normal or decreased, or the lymphocyte count is decreased in the early stage of onset. On the basis of confirmed cases meeting the criteria for suspected cases, sputum, throat swabs, lower respiratory tract secretions, and other specimens were tested by real-time fluorescent RT-PCR to detect positive nucleic acid of the new coronavirus, or viral gene sequencing was highly similar to known new coronavirus source. Trial diagnosis and treatment plan according to the fourth edition of the new Coronavirus Infected Pneumonia issued by the National Health and Health Commission, Diagnosis criteria for severe pneumonia: One of the following: (1) respiratory distress (>=30 beats / min), (2) In a resting state, SPO2<=93% under inhaled air, (3) PaO2 / FiO2<=300mmHg, Criteria for critical pneumonia: One of the following: (1) Respiratory failure, requiring mechanical ventilation, (2) shock, (3) complicated with other organ failure requires intensive care unit.

1. First diagnosis of novel coronavirus infection 2. Epidemiological history Travel history or residence history of Wuhan City within two weeks before the onset of illness, or patients who have had fever from Wuhan with respiratory symptoms within 14 days before the onset of illness, or have cluster Onset, 3. Clinical manifestations: (1) fever, (2) with the following imaging characteristics of pneumonia, early lesions are limited, showing patchy, subsegmental or segmental ground glass shadows, with or without thickening of lobular septum, progression Increased lesions and expanded scope, involving multiple lung lobes, some lesions consolidation, coexistence of ground glass shadows and consolidation shadows or strip shadows, diffuse lung lesions in severe stages, a few of which show white lung , mainly consolidation , Combined with ground glass shadow, multiple cord shadow, air bronchus sign. Pleural effusion or lymphadenopathy are rare, (3) The total number of white blood cells is normal or decreased, or the lymphocyte count is decreased in the early stage of onset. On the basis of confirmed cases meeting the criteria for suspected cases, sputum, throat swabs, lower respiratory tract secretions, and other specimens were tested by real-time fluorescent RT-PCR to detect positive nucleic acid of the new coronavirus, or viral gene sequencing was highly similar to known new coronavirus source. Trial diagnosis and treatment plan according to the fourth edition of the new Coronavirus Infected Pneumonia issued by the National Health and Health Commission, Diagnosis criteria for severe pneumonia: One of the following: (1) respiratory distress (>=30 beats / min), (2) In a resting state, SPO2<=93% under inhaled air, (3) PaO2 / FiO2<=300mmHg, Criteria for critical pneumonia: One of the following: (1) Respiratory failure, requiring mechanical ventilation, (2) shock, (3) complicated with other organ failure requires intensive care unit.