Docfag here:
Hydroxychloroquine (HCQ) has 4 mechanisms of action:
HCQ binds the GBD of the spike protein preventing binding with the ACE2 receptor
https://www.sciencedirect.com/science/article/pii/S0924857920301102
HCQ blocks virus infection by increasing endosomal pH required for virus/cell fusion
https://www.nature.com/articles/s41422-020-0282-0?fbclid=IwAR3c5iy9h65X1cnkrL6i6fJcWwi0ygN1LtI67SkcgREM4DyxxAcPauRuf5w
HCQ has an anti-inflammatory effect which is protective against cytokine storm
https://europepmc.org/article/med/8336306
Zinc inhibits coronavirus RNA polymerase
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2973827/
HCQ is a zinc ionophore allowing more zinc to enter the cell which is why it is important to take HCQ with Zinc
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4182877/
Quercetin and EGCG (green tea extract) are also Zinc ionophores, which you may use with zinc for prevention.
https://pubs.acs.org/doi/abs/10.1021/jf5014633