Evaluation of the efficacy and safety of Danoprevir sodium tablet combined with ritonavir for SARS-CoV-2 infected patients.

Given no specific antiviral therapies for COVID-19 approved yet and Danoprevir sodium tablet, an oral Hepatitis C virus protease inhibitor, approved in China in June 2018 , this open, controlled trial will evaluate the efficacy and safety of Danoprevir sodium tablet in hospitalized patients infected with SARS-CoV-2.

Inclusion Criteria:

1. Aged 18-75 years old;
2. Pneumonia patients with SARS-CoV-2 infection were confirmed to be positive by RT-PCR and clinical manifestations. The diagnosis standard refers to the diagnosis and treatment plan for pneumonia with SARS-CoV-2 infection (Current Trial Version);
3. Patients with newly diagnosed respiratory system discomfort who have been hospitalized (the diagnosis time of respiratory system discomfort shall not exceed 7 days);
4. Women and their partners who have no planned pregnancy for nearly half a year and are willing to take effective contraceptive measures within 30 days from the first administration of the study drug to the last administration;
5. Agree not to participate in other clinical research within 30 days from the first administration of the study drug to the last administration;
6. Patients who voluntarily sign informed consent.

Exclusion Criteria:

1. The pneumonia patients with severe SARS-CoV-2 infection met one of the following conditions: respiratory distress, RR≥30 times / min; or SaO2 / SpO2≤93% in resting state; or arterial partial pressure of oxygen (PaO2) / concentration of oxygen (FiO2) ≤300MMHG (1mmhg = 0.133kpa);
2. Pneumonia patients with severe SARS-CoV-2 infection meet one of the following conditions: respiratory failure and need mechanical ventilation; or shock; or other organ failure combined with ICU monitoring treatment;
3. Severe liver disease (such as child Pugh score ≥C, AST > 5 times upper limit);
4. Patients with contraindications specified in the instructions of danoprevir and ritonavir tablets;
5. Patients who plan to take protease inhibitors other than danoprevir and ritonavir simultaneously during the trial.
6. The pregnancy test of female subjects in the screening period was positive;
7. The researchers judged that it was not suitable to participate in this clinical trial (for example, patients who may be transferred to another hospital during the study period; patients with multiple basic diseases, etc.).