https://www.researchgate.net/publication/358386329_Strictly_regular_use_of_ivermectin_as_prophylaxis_for_COVID-19_leads_to_a_90_reduction_in_COVID-19_mortality_rate_in_a_dose-response_manner_definitive_results_of_a_prospective_observational_study_of_a

regular use of IVM led to a 100% reduction in hospitalization, 90% reduction in death.