A whole slew of papers on ivermectin reg covid have been withdrawn or retracted
https://retractionwatch.com/2022/02/11/ivermectin-papers-slapped-with-expressions-of-concern/
https://www.the-scientist.com/frontiers-removes-controversial-ivermectin-paper-pre-publication-68505
https://www.medpagetoday.com/special-reports/exclusives/93658