I don’t think so. I’ve been taking Quercetin, zinc, vitamin D, quinine, resveratrol, etc and I got two colds after getting Covid. Did it help with Covid, I don’t know but I’m 53, in good shape and was in/out with Covid in 3 days.
Oh and I over dosed on “Airborne” as well. I think that helps too
You have somehow stumbled onto wrong information.
Quercetin is an ionophore, enabling entry of zinc into the cells where it inhibits viral replication.
Quercetin and zinc are a cure for the common cold.
The vitamin D is a major prevention for coronavirus. Keep your level above 50.