I discovered the beneficial effects of colloidal silver years ago and will never be without it in my medicine cabinet. I've used it for infections, 'flu, colds, and as a preventative when I think I've been exposed to some contaminant.
Dude - canadian silver dollars are 99.99% silver.
it is not good using silver coins since they have other metals in them, some are undesirable and could be toxic this could lead to Argyria or other more serious problems, always use 99.99% silver can get rods of this quality and only use distilled water, never use tap water, again other metels are found in tap water, be smart and be safe!
Last year I kept contracting the flu and spent most of the winter in bed. This year it started to come back. I lived alone with no real friends in Reno so I read up and selected Colloidal Silver as the best bet. I went and picked up some high quality Colloidal Silver. Within a few hours the flu symptoms were gone. I tend to be minimal with medicine so I only used the silver when I felt bad. No flu yet this season.
I used a teaspoon several times a day of a top rated brand. I also could not afford to keep buying it so I bought 2 Canadian silver dollars and made my own machine. I am an electronics tech and did well in my college chemistry so it seemed obvious how to build a device that would yield a higher percentage of true colloidal over an ionic solution. You MUST use distilled water and shiny clean electrodes. I heated my water and drove off the dissolved gasses. I used a 30V square wave at about 50kHz to theoretically dislodge microscopic particals of silver into the solution. After about 4-6 hours the electrodes start showing some corrosion and have used that as my finish point. It has worked as well as the store bought solution at a fraction of the cost. I have been giving out bottles to people I'm starting to know and to date, none of them have gotten sick from the flu this year.