There are vitamin C pills with zinc. Probably a lot easier to get than quercetin. You can literally run into walmart and get it as soon as you get a sore throat or are exposed to a sick person. Zinc is important and all that other stuff is unnecessary complication. People won't do all that unless they already believe in that solutuon. But you can convert a lot of people by simply getting them to try vitamin c with zinc. It is simple and hassle free.