The brilliant British doctor Sarah Myhill describes an effective anti-infection (including anti-viral) regime based on vitamin C and iodine.
You need 3 things. Here are links to reliable products you can use to buy them (which I will get some commission on, thanks) – or just use the links to see what you need and then find your own sources.
Vitamin C powder
YOU CAN EASILY MAKE YOUR OWN SALT PIPE
Take a plastic bottle, say 100ml size, and make several holes in the bottom of it. (I used a spike heated up in fire, but you could use a hammer and nail as you prefer)
Put coarse sea salt granules into the pipe to about ⅓ full. That is your salt pipe To use it, just add a few drops 15% iodine and breath in through the open bottle top, slowly in through your nose and out through you mouth. I find in about 10 breaths I can feel the iodine in my throat, so I stop.