Evaluation of clinical efficacy of Chinese medicine in promoting nucleic acid negative transformation of novel coronavirusDelta mutant strain

INTERVENTION: Experimental group:Basic treatment + Fuzheng detoxification granules;Control group:Basic treatment; CONDITION: Novel Coronavirus Pneumonia (COVID‐19) PRIMARY OUTCOME: The change of viral load; SECONDARY OUTCOME: Nucleic acid negative time; 7‐day/14‐day nucleic acid conversion ratio;The ratio of main symptoms disappeared in 7 days/14 days; 7 days/14 days chest CT imaging changes;Hospital stays;prognosis;Whether there is a retest positive after the nucleic acid turns negative within 21 days; INCLUSION CRITERIA: (1) Meets the diagnostic criteria for COVID‐19 (National Edition 8); (2) Over 18 years old; (3) Normal temperature within 48 hours; (4) With air intake, SpO2>93%; (5) Onset time >=7 days; (6) Signed informed consent.