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Patients were randomly assigned to the ridcivir injection group (200mg on the first day, 100mg on the second to the 10th day) and the placebo group with the same dose for 10 days. Of the 236 eligible participants, 158 received readcivir and 78 received placebo. Patients were allowed to use Lito Bernard Vee, interferon and corticosteroids at the same time, and fecal or anal swab samples were collected on the first, third, fifth, 7, 10, 14, 21 and 28 days, respectively, for the detection of viral RNA and quantification. The researchers also developed a set of criteria to measure the clinical improvement of patients, including discharge (score 1) to death (score 6). According to this standard, if a patient's score can be reduced by 2 or more points after treatment, or discharged from hospital, it is regarded as clinical improvement.
