inclusion criteria: a person who has been diagnosed with covid-19 (including asymptomatic) by the covid-19 pcr test (sars-cov-2 nucleic acid detection) within 3 days before the qualification test. a person with oxygen saturation (spo2) in the room air of 95% or more. a person who are 20 years or older at the time of obtaining consent. a person who weigh 40 kg or more at the time of qualification test. a person who understands the content of this clinical trial and can obtain written consent to participate in the clinical trial.

inclusion criteria: a person who has been diagnosed with covid-19 (including asymptomatic) by the covid-19 pcr test (sars-cov-2 nucleic acid detection) within 3 days before the qualification test. a person with oxygen saturation (spo2) in the room air of 95% or more. a person who are 20 years or older at the time of obtaining consent. a person who weigh 40 kg or more at the time of qualification test. a person who understands the content of this clinical trial and can obtain written consent to participate in the clinical trial.

inclusion criteria: 1. a person who has been diagnosed with covid-19 (including asymptomatic) by the covid-19 pcr test (sars-cov-2 nucleic acid detection) within 3 days before the qualification test. 2. a person with oxygen saturation (spo2) in the room air of 95% or more. 3. a person who are 20 years or older at the time of obtaining consent. 4. a person who weigh 40 kg or more at the time of qualification test. 5. a person who understands the content of this clinical trial and can obtain written consent to participate in the clinical trial.

inclusion criteria: 1. a person who has been diagnosed with covid-19 (including asymptomatic) by the covid-19 pcr test (sars-cov-2 nucleic acid detection) within 3 days before the qualification test. 2. a person with oxygen saturation (spo2) in the room air of 95% or more. 3. a person who are 20 years or older at the time of obtaining consent. 4. a person who weigh 40 kg or more at the time of qualification test. 5. a person who understands the content of this clinical trial and can obtain written consent to participate in the clinical trial.