After my father got covid with mildish pneumonia I just bought more than 3 grams worth of IVM cause I did not want to go through that experience again with grandparents (they are still reluctant to get vaccine, but supposedly they want to take the Chinese CorornaVac vaccine since it has the lightest side-effects). I feel like whether IVM is effective or not will be known for sure only after the pandemic end when nobody will care about it anymore...