1. Adult male and female over the age of 19 2. Real-time reverse transcription polymerase chain reaction with specimens collected from the upper airway (oral/nasopharyngeal smear mix, etc.) or/and lower airway (sputum, etc.) within 7 days of randomization Reverse transcription polymerase chain reaction (rRT-PCR) test results, the first confirmed COVID-19 infection 3. Time of randomization COVID-19 - Those who have developed symptoms within 7 days 4. A person who corresponds to moderate COVID-19 at the time of randomization, and who meets the condition of lower respiratory tract infection and blood oxygen saturation (SpO2) = 94% in indoor air conditions by imaging or clinical findings 5. According to the eight-category ordinal scale, those who are classified as a score of 4 or 5 at the time of randomization 6. Those who are hospitalized or are expected to be admitted to a medical institution 7. A person who voluntarily decides to participate and agrees in writing to abide by the precautions after hearing and fully understanding the detailed explanation of this clinical trial

1. Adult male and female over the age of 19 2. Real-time reverse transcription polymerase chain reaction with specimens collected from the upper airway (oral/nasopharyngeal smear mix, etc.) or/and lower airway (sputum, etc.) within 7 days of randomization Reverse transcription polymerase chain reaction (rRT-PCR) test results, the first confirmed COVID-19 infection 3. Time of randomization COVID-19 - Those who have developed symptoms within 7 days 4. A person who corresponds to moderate COVID-19 at the time of randomization, and who meets the condition of lower respiratory tract infection and blood oxygen saturation (SpO2) = 94% in indoor air conditions by imaging or clinical findings 5. According to the eight-category ordinal scale, those who are classified as a score of 4 or 5 at the time of randomization 6. Those who are hospitalized or are expected to be admitted to a medical institution 7. A person who voluntarily decides to participate and agrees in writing to abide by the precautions after hearing and fully understanding the detailed explanation of this clinical trial

1. Adult male and female over the age of 19 2. Real-time reverse transcription polymerase chain reaction with specimens collected from the upper airway (oral/nasopharyngeal smear mix, etc.) or/and lower airway (sputum, etc.) within 7 days of randomization Reverse transcription polymerase chain reaction (rRT-PCR) test results, the first confirmed COVID-19 infection 3. Time of randomization COVID-19 - Those who have developed symptoms within 7 days 4. A person who corresponds to moderate COVID-19 at the time of randomization, and who meets the condition of lower respiratory tract infection and blood oxygen saturation (SpO2) = 94% in indoor air conditions by imaging findings 5. According to the eight-category ordinal scale, those who are classified as moderate at the time of randomization (corresponding to a score of 4) 6. Those who are hospitalized or are expected to be admitted to a medical institution 7. A person who voluntarily decides to participate and agrees in writing to abide by the precautions after hearing and fully understanding the detailed explanation of this clinical trial

1. Adult male and female over the age of 19 2. Real-time reverse transcription polymerase chain reaction with specimens collected from the upper airway (oral/nasopharyngeal smear mix, etc.) or/and lower airway (sputum, etc.) within 7 days of randomization Reverse transcription polymerase chain reaction (rRT-PCR) test results, the first confirmed COVID-19 infection 3. Time of randomization COVID-19 - Those who have developed symptoms within 7 days 4. A person who corresponds to moderate COVID-19 at the time of randomization, and who meets the condition of lower respiratory tract infection and blood oxygen saturation (SpO2) = 94% in indoor air conditions by imaging findings 5. According to the eight-category ordinal scale, those who are classified as moderate at the time of randomization (corresponding to a score of 4) 6. Those who are hospitalized or are expected to be admitted to a medical institution 7. A person who voluntarily decides to participate and agrees in writing to abide by the precautions after hearing and fully understanding the detailed explanation of this clinical trial