Covid is a normal Corona virus. (Well, ok, a manufactured virus but still a Corona)does that work on the normal viruses?
My wife averages 2 hrs to clear cold/flu symptoms, me, 4. First signs of a cold or flu we take one standard dose. Been doing this for nearly 3 yrs. It hasn't stopped all viruses, however, One rhinovirus I got was not impressed and that lasted the normal 2 weeks
It has also knocked out cold sores (herpes simplex) a lot faster than the Denivir I used to use.
For the most part it shuts down viral reproduction enough for your immune system to more quickly clear it out.
There are hundreds of studies out now showing the benefits against most viruses along with certain cancers. Recent studies have come out on upping the original 0.2mg/kg to 2x and 4x that so will try that for the next obvious head cold.
Combine it with making sure your vit D level is up...5000-10,000iu/day for those of up up north.
We have a lot of friends who do the same with same results.