COVID-19(5) SARS-CoV-2(3) antioxidant activity(3) disease severity(3) Essential metals(3) vitamins(3) Antiviral(2) copper(2) Influenza(1) Copper blend(1) Zinc parameterization(1) antiviral agent(1) Spike protein(1) metal complexes(1) monoclonal antibodies(1) Zinc-bound ACE2(1) antimicrobial(1) HIV(1) viral inactivation(1) Metalloproteins(1) Copper nanomaterials(1) biological activity(1) binding free energy(1) virus inactivation(1)