Just some fun, peer reviewed reads:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7395818/

 https://pubmed.ncbi.nlm.nih.gov/21079686/

https://pubmed.ncbi.nlm.nih.gov/21079686/

tl:dr:  Zinc and some commonly available OTC supplements that act as ionophores screw with coof, and other viri being able to replicate.  I think a lot of us took zinc when we had a cold or whatnot, and it sorta helped, maybe didn't, but there seems to be a missing ingredient.  Not missing now.