inclusion criteria: 1. age ≥18 years; 2. laboratory (rt-pcr) diagnosis of common patients infected with covid-19 (refer to the fifth edition of the chinese guidelines for diagnosis and treatment); 3. chest imaging confirmed lung damage; 4. the diagnosis is less than or equal to 8 days;

inclusion criteria: 1. age ≥18 years; 2. laboratory (rt-pcr) diagnosis of common patients infected with covid-19 (refer to the fifth edition of the chinese guidelines for diagnosis and treatment); 3. chest imaging confirmed lung damage; 4. the diagnosis is less than or equal to 8 days;

inclusion criteria: age ≥18 years; laboratory (rt-pcr) diagnosis of common patients infected with covid-19 (refer to the fifth edition of the chinese guidelines for diagnosis and treatment); chest imaging confirmed lung damage; the diagnosis is less than or equal to 8 days;

inclusion criteria: age ≥18 years; laboratory (rt-pcr) diagnosis of common patients infected with covid-19 (refer to the fifth edition of the chinese guidelines for diagnosis and treatment); chest imaging confirmed lung damage; the diagnosis is less than or equal to 8 days;

inclusion criteria: 1. age ≥18 years; 2. laboratory (rt-pcr) diagnosis of common patients infected with covid-19 (refer to the fifth edition of the chinese guidelines for diagnosis and treatment); 3. chest imaging confirmed lung damage; 4. the diagnosis is less than or equal to 8 days;

inclusion criteria: 1. age ≥18 years; 2. laboratory (rt-pcr) diagnosis of common patients infected with covid-19 (refer to the fifth edition of the chinese guidelines for diagnosis and treatment); 3. chest imaging confirmed lung damage; 4. the diagnosis is less than or equal to 8 days;