Medical News Today:
These are some foods high in ZINC. Zinc kills coronavirus if it can get into your cells. BUT DO NOT take high doses of zinc supplements! Instead, include zinc-rich foods in your healthy diet.
This chart gives the potency per 100 grams, and also how much you have to consume to get 100 grams.

IMPORTANT NOTE – For zinc to be effective in killing the coronavirus, it needs an “activator” that will open up channels into the cell and allow the zinc inside. Natural ACTIVATORS are quercetin & epigallocatechin.