We have been using this home-made spray since first hearing about it in 2020.
Some mention of Cherokee County, GA in other responses. We live in the neighboring county that was a mini epi-center of concern for the WuFlu in early 2020.
We have been living our lives maskless since April 2020, meeting regularly with friends, neighbors, complete strangers in Fellowship and community gatherings/activities since then.
Neither of us have had any variation of the WuFlu. We are unvaxxed/unboosted and not living in fear.