here is an interesting article from the NEW ENGLAND JOURNAL OF MEDICINE about a WHO study of Remdesivir, Interferon etc. being basically free of any measurable efficacy:
CONCLUSIONS
These remdesivir, hydroxychloroquine, lopinavir, and interferon regimens had little or no effect on hospitalized patients with Covid-19, as indicated by overall mortality, initiation of ventilation, and duration of hospital stay.[color=red][color=red][color=red][/color][/color][/color] (Funded by the World Health Organization; ISRCTN Registry number, ISRCTN83971151. opens in new tab; ClinicalTrials.gov number, NCT04315948. opens in new tab.)