1. 18 years old <= age <= 60 years old when screening, not limited to men and women, 2. Who are in close contact with suspected cases, confirmed cases, and positive test of new coronavirus nucleic acid, and those who have not taken effective protection, that is, close contacts, 3. Study subjects are willing to be randomly assigned to any designated treatment group, 4. Must agree to not participate in another study of study drugs until day 24 of completion of the study. 5. Participants volunteered to participate in this study and signed informed consent.

1. 18 years old <= age <= 60 years old when screening, not limited to men and women, 2. Who are in close contact with suspected cases, confirmed cases, and positive test of new coronavirus nucleic acid, and those who have not taken effective protection, that is, close contacts, 3. Study subjects are willing to be randomly assigned to any designated treatment group, 4. Must agree to not participate in another study of study drugs until day 24 of completion of the study. 5. Participants volunteered to participate in this study and signed informed consent.