I had the Hong Kong Flu 50+ years ago I honestly thought I was going to die AND was wishing I would die!! That flu put me IN BED for a month I thought I would NEVER feel like myself again, I was in my early 20’s OMG it was AWFUL!! I have NEVER had a cold OR flu since recovering from that 50+ years ago!! Never had a flu shot either!! When Covid hit I followed the supplement regimen my Doc gave me which was EXACTLY what most of us here were following, did not catch the damn thing did not wear a mask unless required by a store ect.
I have been taking the recommended supplements for COVID and haven’t had it. My vaxed daughter had it though.