Wide distribution of ivermectin in Africa to combat river blindness does not appear to have had anything to do whatsoever with low death rates from COVID-19 in places like Angola (62 deaths per million of population), Kenya (120), and Nigeria (16).
It turns out that ivermectin was widely distributed in eight Latin and South American countries from June, August, and December 2020, but all of them had steeply higher death rates from the disease:
Peru 6,945
Brazil 3,396
Mexico 2,654
Panama 2,089
Bolivia 1,974
Guatemala 1,222
Honduras 1,165
El Salvador 652.
Exposure to fresh air and full spectrum sunlight with its infrared and ultraviolet radiation has been shown to speed recovery from the disease: