1) A subject who voluntarily decides to participate this clinical study after hearing the detailed explanation of this clinical trial and agrees in writing to abide by the precautions 2) Adults over 19 years of age at the time of screening 3) Those who are confirmed to be infected with COVID-19 by RT-PCR test within 3 days from the date of randomization 4) Those who have developed one or more of the symptoms of COVID-19* within 5 days from the date of randomization, and have at least two or more symptoms of 2 or higher among the symptom scores** determined on the day of randomization * Coronavirus Infectious Disease-19 Symptoms: Fever (above 38.0?), cough, sore throat, headache, muscle pain, chills/tremor, runny nose/stuffy nose, sputum, fatigue/malarity, shortness of breath/shortness of breath, nausea/nausea, vomiting, diarrhea ** Symptoms are evaluated in a total of 4 stages: 0=(absent), 1=(mild), 2=(moderate), 3=(severe). 5) Those who are mild or moderate according to the NIH triage criteria at screening and randomization.

1) A subject who voluntarily decides to participate this clinical study after hearing the detailed explanation of this clinical trial and agrees in writing to abide by the precautions 2) Adults over 19 years of age at the time of screening 3) Those who are confirmed to be infected with COVID-19 by RT-PCR test within 3 days from the date of randomization 4) Those who have developed one or more of the symptoms of COVID-19* within 5 days from the date of randomization, and have at least two or more symptoms of 2 or higher among the symptom scores** determined on the day of randomization * Coronavirus Infectious Disease-19 Symptoms: Fever (above 38.0?), cough, sore throat, headache, muscle pain, chills/tremor, runny nose/stuffy nose, sputum, fatigue/malarity, shortness of breath/shortness of breath, nausea/nausea, vomiting, diarrhea ** Symptoms are evaluated in a total of 4 stages: 0=(absent), 1=(mild), 2=(moderate), 3=(severe). 5) Those who are mild or moderate according to the NIH triage criteria at screening and randomization.