Cureus is a bit of a weird journal, they have very fast peer review time instead relying officially on post-publication peer review

Here's a weird case on a different paper in the same journal: http://retractionwatch.com/2015/11/02/sex-addiction-article-...

In this case, the two first authors Lucy Kerr and Flavio Cadegiani are (partially?) funded by Vitamedic, a company that makes Ivermectin. That's not mentioned in the Cureus paper. It is mentioned in some of their papers, like this one: https://www.researchgate.net/publication/357313430_Ivermecti...

They seem to be based in Brazil. Given that intestinal worms are still common in Brazil it may have been that people saw a health improvement in Covid-patients after Ivermectin got rid of the worms.