I haven't read any of this thread, so forgive me if the following has been recommended, but you can get an antiviral boost by consuming activated garlic.
Simply crush a clove and let is sit for 10 minutes to active the compound (allicin) that acts as an antiviral and consume raw. Gargling with your saliva after chewing on it for a while is great for getting the spot (back of the throat) where many nasties like to fester.
Another antiviral that is easily used is 100% pure copper. Wear a copper bracelet or regularly touch copper for the added benefit. Unlike silver, it doesn't have to be wet for the antiviral effect.
Stay safe huddle.