inclusion criteria: male or female, aged ≥ 10years laboratory confirmation of covid19 infection by reverse-transcription polymerase chain reaction (rt-pcr) from any diagnostic sampling source; and moderate illness: in compliance with the 2019-coronavirus pneumonia diagnosis standard [according to the novel coronavirus infection pneumonia diagnosis and treatment program (trial implementation version 6) issued by the national health and medical commission, and world health organization (who) 2019 new coronavirus guidelines standards]: (a) increased breathing rate (≥30 beats / min), difficulty breathing, cyanosis of the lips; (b) in resting state, means oxygen saturation ≤93%; (c) partial pressure of arterial oxygen (pao2) / fraction of inspired oxygen (fio2) ≤300 mmhg (1mmhg = 0.133kpa); critically ill : respiratory failure, septic shock, muti-organ dysfunction syndrome (mods)

inclusion criteria: male or female, aged ≥ 10years laboratory confirmation of covid19 infection by reverse-transcription polymerase chain reaction (rt-pcr) from any diagnostic sampling source; and moderate illness: in compliance with the 2019-coronavirus pneumonia diagnosis standard [according to the novel coronavirus infection pneumonia diagnosis and treatment program (trial implementation version 6) issued by the national health and medical commission, and world health organization (who) 2019 new coronavirus guidelines standards]: (a) increased breathing rate (≥30 beats / min), difficulty breathing, cyanosis of the lips; (b) in resting state, means oxygen saturation ≤93%; (c) partial pressure of arterial oxygen (pao2) / fraction of inspired oxygen (fio2) ≤300 mmhg (1mmhg = 0.133kpa); critically ill : respiratory failure, septic shock, muti-organ dysfunction syndrome (mods)

inclusion criteria: 1. male or female, aged ≥ 10years 2. laboratory confirmation of covid19 infection by reverse-transcription polymerase chain reaction (rt-pcr) from any diagnostic sampling source; and 3. moderate illness: in compliance with the 2019-coronavirus pneumonia diagnosis standard [according to the novel coronavirus infection pneumonia diagnosis and treatment program (trial implementation version 6) issued by the national health and medical commission, and world health organization (who) 2019 new coronavirus guidelines standards]: (a) increased breathing rate (≥30 beats / min), difficulty breathing, cyanosis of the lips; (b) in resting state, means oxygen saturation ≤93%; (c) partial pressure of arterial oxygen (pao2) / fraction of inspired oxygen (fio2) ≤300 mmhg (1mmhg = 0.133kpa); 4. critically ill : respiratory failure, septic shock, muti-organ dysfunction syndrome (mods)

inclusion criteria: 1. male or female, aged ≥ 10years 2. laboratory confirmation of covid19 infection by reverse-transcription polymerase chain reaction (rt-pcr) from any diagnostic sampling source; and 3. moderate illness: in compliance with the 2019-coronavirus pneumonia diagnosis standard [according to the novel coronavirus infection pneumonia diagnosis and treatment program (trial implementation version 6) issued by the national health and medical commission, and world health organization (who) 2019 new coronavirus guidelines standards]: (a) increased breathing rate (≥30 beats / min), difficulty breathing, cyanosis of the lips; (b) in resting state, means oxygen saturation ≤93%; (c) partial pressure of arterial oxygen (pao2) / fraction of inspired oxygen (fio2) ≤300 mmhg (1mmhg = 0.133kpa); 4. critically ill : respiratory failure, septic shock, muti-organ dysfunction syndrome (mods)