1. pregnancy, lactation and those who are not pregnant but do not take effective contraceptives measures; 2. patients with malignant tumor, other serious systemic diseases and psychosis; 3. patients who are participating in other clinical trials; 4. inability to provide informed consent or to comply with test requirements. 5. co-infection of hiv, tuberculosis, influenza virus, adenovirus and other respiratory infection virus. 6. invasive ventilation 7. shock 8. combined with other organ failure( need organ support) 9. interstitial lung damage caused by other reasons ( in 2 weeks) 10. the pulmonary imaging revealed the interstitial damage of lungs before the covid-19 confirmed.

1. pregnancy, lactation and those who are not pregnant but do not take effective contraceptives measures; 2. patients with malignant tumor, other serious systemic diseases and psychosis; 3. patients who are participating in other clinical trials; 4. inability to provide informed consent or to comply with test requirements. 5. co-infection of hiv, tuberculosis, influenza virus, adenovirus and other respiratory infection virus. 6. invasive ventilation 7. shock 8. combined with other organ failure( need organ support) 9. interstitial lung damage caused by other reasons ( in 2 weeks) 10. the pulmonary imaging revealed the interstitial damage of lungs before the covid-19 confirmed.

pregnancy, lactation and those who are not pregnant but do not take effective contraceptives measures; patients with malignant tumor, other serious systemic diseases and psychosis; patients who are participating in other clinical trials; inability to provide informed consent or to comply with test requirements. co-infection of hiv, tuberculosis, influenza virus, adenovirus and other respiratory infection virus. invasive ventilation shock combined with other organ failure( need organ support) interstitial lung damage caused by other reasons ( in 2 weeks) the pulmonary imaging revealed the interstitial damage of lungs before the covid-19 confirmed.

pregnancy, lactation and those who are not pregnant but do not take effective contraceptives measures; patients with malignant tumor, other serious systemic diseases and psychosis; patients who are participating in other clinical trials; inability to provide informed consent or to comply with test requirements. co-infection of hiv, tuberculosis, influenza virus, adenovirus and other respiratory infection virus. invasive ventilation shock combined with other organ failure( need organ support) interstitial lung damage caused by other reasons ( in 2 weeks) the pulmonary imaging revealed the interstitial damage of lungs before the covid-19 confirmed.

1. pregnancy, lactation and those who are not pregnant but do not take effective contraceptives measures; 2. patients with malignant tumor, other serious systemic diseases and psychosis; 3. patients who are participating in other clinical trials; 4. inability to provide informed consent or to comply with test requirements. 5. co-infection of hiv, tuberculosis, influenza virus, adenovirus and other respiratory infection virus. 6. invasive ventilation 7. shock 8. combined with other organ failure( need organ support) 9. interstitial lung damage caused by other reasons ( in 2 weeks) 10. the pulmonary imaging revealed the interstitial damage of lungs before the covid-19 confirmed.

1. pregnancy, lactation and those who are not pregnant but do not take effective contraceptives measures; 2. patients with malignant tumor, other serious systemic diseases and psychosis; 3. patients who are participating in other clinical trials; 4. inability to provide informed consent or to comply with test requirements. 5. co-infection of hiv, tuberculosis, influenza virus, adenovirus and other respiratory infection virus. 6. invasive ventilation 7. shock 8. combined with other organ failure( need organ support) 9. interstitial lung damage caused by other reasons ( in 2 weeks) 10. the pulmonary imaging revealed the interstitial damage of lungs before the covid-19 confirmed.