STRONG anecdotal evidence VERY early on in the pandemic: intelligent testimony about the amazing COVID-19 prophylaxis results among VERY elderly residents with many comorbidities at this nursing home in Canada due to the coincidental use of ivermectin for a scabies outbreak immediately before the pandemic hit. They were officially ignored and discouraged from speaking of it. A nursing home in France had the same coincidence with similar results [not mentioned in the video]:

https://www.youtube.com/watch?v=8XCYzpHB....

Also:

American Journal of Therapeutics 28, e299e318 (2021); 2021 Apr 22
Review of the Emerging Evidence Demonstrating the Efficacy of Ivermectin in the Prophylaxis and Treatment of COVID-19

https://pubmed.ncbi.nlm.nih.gov/34375047....

Also:

Collective overview and analysis of results of ivermectin studies

https://c19ivermectin.com/