1) The COVID-19 patient who diagnosed by PCR within 3 days prior to randomized And who is hospitalized with COVID-19 related symptoms2) The subject who has symptoms of COVID-19 within 7 days3) The subject with pneumonia confirmed by imaging diagnosis related to COVID-19 OR a 70-year-old or older OR 60-year-old or older with underlying disease (diabetes or hypertension or obesity or smoker)4) Willing and able to provide written informed consent prior to performing study procedures

1) The COVID-19 patient who diagnosed by PCR within 3 days prior to randomized And who is hospitalized with COVID-19 related symptoms2) The subject who has symptoms of COVID-19 within 7 days3) The subject with pneumonia confirmed by imaging diagnosis related to COVID-19 OR a 70-year-old or older OR 60-year-old or older with underlying disease (diabetes or hypertension or obesity or smoker)4) Willing and able to provide written informed consent prior to performing study procedures