"Pfizer recently announced that its new protease inhibitor-based drug was 89% effective in preventing hospitalization due to COVID-19 and it is seeking an emergency use authorization for it from the FDA."
https://sciencebasedmedicine.org/pfizer-new-covid-19-protease-inhibitor-drug-is-not-just-repackaged-ivermectin/
"zinc not only inhibits the SARS-CoV-2 main protease (Mpro) with nanomolar affinity, but also viral replication."
https://pubmed.ncbi.nlm.nih.gov/34514483/
Glycyrrhizin Effectively Inhibits SARS-CoV-2 Replication by Inhibiting the Viral Main Protease
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8066091/
"Prasad, a medical doctor who spent his career researching the mineral zinc, said he and his wife used the same treatment of zinc and hydroxychloroquine, a malaria drug that is being studied as a treatment for the coronavirus. Prasad said he was taking zinc as a supplement before he began having symptoms of the virus at the end of March."
https://www.detroitnews.com/story/news/local/michigan/2020/04/17/doctor-92-treats-himself-says-hes-beat-covid-19/5147499002/