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"The Zelenko COVID-19 Protocols was developed by Dr Vladimir Zelenko. The protocol has as its centerpiece, but not exclusive piece, the combined use of Hydroxychloroquine (HCQ) and Zinc as a means by which a person can both help to prevent or mitigate the contraction of COVID-19, or can actually treat the disease once it has been diagnosed. " AND
"He has since evolved his protocols to include a quercetin, zinc, vitamin D and C protocol for low-risk patients as well as guidelines for COVID-19 prevention. "
https://onedaymd.aestheticsadvisor.com/2021/04/zelenko-Z-STACK-vitamin-review.html