Furthermore, an open-label, prospective, randomized, multicenter study in adults (n = 236) with COVID-19 pneumonia in China revealed that favipiravir (1600 mg orally twice daily on the first day, then 600 mg orally twice daily for 7–10 days) was associated with a higher 7-day clinical recovery rate compared to a control group treated with umifenovir, a potential inhibitor of the membrane fusion stage during the virus infection, (200 mg three times daily for 7–10 days).