The study is designed as a randomized, parallel, double-blind, placebo-controlled trial, in which all participants will be randomized to a test group or control group in a 1:1 ratio.~The test group will be given Azvudine in combination with conventional therapy excluding anti-viral therapy and observed for efficacy. The control group will be given placebo in combination with conventional therapy excluding anti-viral therapy and observed for efficacy.~Test Group will recruit 548 participants who will be given Azvudine + conventional therapy other than antiviral*5 mg/day, oral, up to 7 days (1 mg/tablet).~Control Group will recruit 548 who will be given Placebo + conventional therapy other than antiviral* 5 tablets/day, oral, up to 7 days.
To investigate whether treatment with Azvudine reduces the risk of severe illness or death in patients who are at a potential risk of progressing to severe COVID-19 infection.