Check out the long list of studies of Ivermectin--roughly 100,000 people in over 70 studies reporting roughly on average a better than 50% benefit more than 60% when started in the early days of infection. https://ivmmeta.com/
People should be aware of the CDC's Leon, et al study of natural immunity vs vaccine immunity. In short, during the Delta wave natural immunity after recovering from the virus was not inferior to vaccine immunity for preventing hospitalization. https://www.cdc.gov/mmwr/volumes/71/wr/mm7104e1.htm
Natural immunity was superior to vaccine immunity for preventing infection.