(1) Age: 18 to 74 years (at the time of informed consent) (2) Gender: Male or female (3) Patients who meet all of the following criteria 1), 2), and 3) at the time of enrollment 1) Patients with SARS-CoV-2-positive airway specimens such as nasopharyngeal swab, nasal aspirate, airway aspirate, or saliva by RT-PCR test 2) Patients without lung lesions on chest images that compatible with pneumonia 3) Patients with a fever more than or equal to 37.5 degree celsius or symptoms of COVID-19 (including cough, malaise or fatigue, headache, sore throat, nasal congestion, chill or sweating, muscle or joint pain, chest pain, diarrhea, loss of taste and loss of smell) (4) For premenopausal female patients, patients who have been confirmed to be negative on a urine pregnancy test before administration of the study drug (5) Patients who understand the contents of this study and are able to provide written consent by themselves without assistance

(1) Age: 18 to 74 years (at the time of informed consent) (2) Gender: Male or female (3) Patients who meet all of the following criteria 1), 2), and 3) at the time of enrollment 1) Patients with SARS-CoV-2-positive airway specimens such as nasopharyngeal swab, nasal aspirate, airway aspirate, or saliva by RT-PCR test 2) Patients without lung lesions on chest images that compatible with pneumonia 3) Patients with a fever more than or equal to 37.5 degree celsius or symptoms of COVID-19 (including cough, malaise or fatigue, headache, sore throat, nasal congestion, chill or sweating, muscle or joint pain, chest pain, diarrhea, loss of taste and loss of smell) (4) For premenopausal female patients, patients who have been confirmed to be negative on a urine pregnancy test before administration of the study drug (5) Patients who understand the contents of this study and are able to provide written consent by themselves without assistance

(1) Age: 18 to 74 years (at the time of informed consent) (2) Gender: Male or female (3) Patients who meet all of the following criteria 1)&#44, 2)&#44, and 3) at the time of enrollment 1) Patients with SARS&#45,CoV&#45,2&#45,positive airway specimens such as nasopharyngeal swab&#44, nasal aspirate&#44, or airway aspirate by RT&#45,PCR test 2) Patients without new lung lesions on chest images 3) Patients with a fever of 37.5°C or more (4) For premenopausal female patients&#44, patients who have been confirmed to be negative on a urine pregnancy test before administration of the study drug (5) Patients who understand the contents of this study and are able to provide written consent by themselves without assistance&#44, or as appropriate with their assent and consent of their parents

(1) Age: 18 to 74 years (at the time of informed consent) (2) Gender: Male or female (3) Patients who meet all of the following criteria 1)&#44, 2)&#44, and 3) at the time of enrollment 1) Patients with SARS&#45,CoV&#45,2&#45,positive airway specimens such as nasopharyngeal swab&#44, nasal aspirate&#44, or airway aspirate by RT&#45,PCR test 2) Patients without new lung lesions on chest images 3) Patients with a fever of 37.5°C or more (4) For premenopausal female patients&#44, patients who have been confirmed to be negative on a urine pregnancy test before administration of the study drug (5) Patients who understand the contents of this study and are able to provide written consent by themselves without assistance&#44, or as appropriate with their assent and consent of their parents

(1) Age: 18 to 74 years (at the time of informed consent) (2) Gender: Male or female (3) Patients who meet all of the following criteria 1), 2), and 3) at the time of enrollment 1) Patients with SARS-CoV-2-positive airway specimens such as nasopharyngeal swab, nasal aspirate, or airway aspirate by RT-PCR test 2) Patients without new lung lesions on chest images 3) Patients with a fever of 37.5°C or more (4) For premenopausal female patients, patients who have been confirmed to be negative on a urine pregnancy test before administration of the study drug (5) Patients who understand the contents of this study and are able to provide written consent by themselves without assistance, or as appropriate with their assent and consent of their parents

(1) Age: 18 to 74 years (at the time of informed consent) (2) Gender: Male or female (3) Patients who meet all of the following criteria 1), 2), and 3) at the time of enrollment 1) Patients with SARS-CoV-2-positive airway specimens such as nasopharyngeal swab, nasal aspirate, or airway aspirate by RT-PCR test 2) Patients without new lung lesions on chest images 3) Patients with a fever of 37.5°C or more (4) For premenopausal female patients, patients who have been confirmed to be negative on a urine pregnancy test before administration of the study drug (5) Patients who understand the contents of this study and are able to provide written consent by themselves without assistance, or as appropriate with their assent and consent of their parents