https://ods.od.nih.gov/factsheets/Zinc-H....
Red meat is the best dietary source of bioavailable zinc, by far, that you're likely to eat on a regular basis. Whole grains undermine mineral absorption. So naturally the dietary recommendations at the end of the article mostly contradict the data above it. Keto, Paleo, Zero Carb, all of those are consistent with getting zinc and having a decent chance at fighting off viruses. If our overlords weren't trying to create demand for the Medical Industrial Complex they'd stop farm subsidies that make grains and soy appear so much cheaper than pasture raised beef.