key inclusion criteria: 1. over 19 years of age 2. covid-19 confirmed by a real-time rt-pcr tests, and hospitalized 3. patients who experienced first symptom related to covid-19 within 7days prior to enrollment and confirmed 2 or more relative symptoms at the time of randomization. 4. patients with peripheral capillary oxygen saturation(spo2) greater than 94% at the time of screening, who do not need supplemental oxygen therapy. key

key inclusion criteria: 1. over 19 years of age 2. covid-19 confirmed by a real-time rt-pcr tests, and hospitalized 3. patients who experienced first symptom related to covid-19 within 7days prior to enrollment and confirmed 2 or more relative symptoms at the time of randomization. 4. patients with peripheral capillary oxygen saturation(spo2) greater than 94% at the time of screening, who do not need supplemental oxygen therapy. key

key inclusion criteria: over 19 years of age covid-19 confirmed by a real-time rt-pcr tests, and hospitalized patients who experienced first symptom related to covid-19 within 7days prior to enrollment and confirmed 2 or more relative symptoms at the time of randomization. patients with peripheral capillary oxygen saturation(spo2) greater than 94% at the time of screening, who do not need supplemental oxygen therapy. key

key inclusion criteria: over 19 years of age covid-19 confirmed by a real-time rt-pcr tests, and hospitalized patients who experienced first symptom related to covid-19 within 7days prior to enrollment and confirmed 2 or more relative symptoms at the time of randomization. patients with peripheral capillary oxygen saturation(spo2) greater than 94% at the time of screening, who do not need supplemental oxygen therapy. key

key inclusion criteria: 1. over 19 years of age 2. covid-19 confirmed by a real-time rt-pcr tests, and hospitalized 3. patients who experienced first symptom related to covid-19 within 7days prior to enrollment and confirmed 2 or more relative symptoms at the time of randomization. 4. patients with peripheral capillary oxygen saturation(spo2) greater than 94% at the time of screening, who do not need supplemental oxygen therapy. key

key inclusion criteria: 1. over 19 years of age 2. covid-19 confirmed by a real-time rt-pcr tests, and hospitalized 3. patients who experienced first symptom related to covid-19 within 7days prior to enrollment and confirmed 2 or more relative symptoms at the time of randomization. 4. patients with peripheral capillary oxygen saturation(spo2) greater than 94% at the time of screening, who do not need supplemental oxygen therapy. key