inclusion criteria: * male or non-pregnant female patients * age ≥18 years * confirmed covid-19 positive by rt-pcr or another validated method * diagnosed with pneumonia requiring 21%\<fio2≤100% to maintain saturation by pulse oximetry (spo2) ≥90% * able and willing to comply with study procedures and follow-up examinations contained within the written consent form

inclusion criteria: * male or non-pregnant female patients * age ≥18 years * confirmed covid-19 positive by rt-pcr or another validated method * diagnosed with pneumonia requiring 21%\<fio2≤100% to maintain saturation by pulse oximetry (spo2) ≥90% * able and willing to comply with study procedures and follow-up examinations contained within the written consent form

inclusion criteria: - male or non-pregnant female patients - age ≥18 years - confirmed covid-19 positive by rt-pcr or another validated method - diagnosed with pneumonia requiring 21%<fio2≤100% to maintain saturation by pulse oximetry (spo2) ≥90% - able and willing to comply with study procedures and follow-up examinations contained within the written consent form

inclusion criteria: - male or non-pregnant female patients - age ≥18 years - confirmed covid-19 positive by rt-pcr or another validated method - diagnosed with pneumonia requiring 21%<fio2≤100% to maintain saturation by pulse oximetry (spo2) ≥90% - able and willing to comply with study procedures and follow-up examinations contained within the written consent form

inclusion criteria: - male or non-pregnant female patients - age ≥18 years - confirmed covid-19 positive by rt-pcr - diagnosed with pneumonia requiring 21%<fio2≤100% to maintain saturation by pulse oximetry (spo2) ≥90% - able and willing to comply with study procedures and follow-up examinations contained within the written consent form

inclusion criteria: - male or non-pregnant female patients - age ≥18 years - confirmed covid-19 positive by rt-pcr - diagnosed with pneumonia requiring 21%<fio2≤100% to maintain saturation by pulse oximetry (spo2) ≥90% - able and willing to comply with study procedures and follow-up examinations contained within the written consent form