1. 18 to 75 years of age, male or female, willing to sign informed consent, 2. Tested positive for novel coronavirus infection after the onset of symptoms using a real time polymerase chain reaction (RT-PCR)-based diagnostic assay, 3. At least 2 viral nucleic acid tests are still positive under current antiviral therapy, 4. No difficulty in swallowing the pills, 5. Willing to abide by the protocol.

1. 18 to 75 years of age, male or female, willing to sign informed consent, 2. Tested positive for novel coronavirus infection after the onset of symptoms using a real time polymerase chain reaction (RT-PCR)-based diagnostic assay, 3. At least 2 viral nucleic acid tests are still positive under current antiviral therapy, 4. No difficulty in swallowing the pills, 5. Willing to abide by the protocol.