I hadn't seen Zelenko's alternative HCQ regimen until recently. Have all but the Schweppes. I suspect 80% or more of those without compromises to immune system are probably pre-protected by past Corona TCells but it does seem some with no specific vulnerability do get hit so can't hurt to have the full arsenal at the ready.
I think a lot have had it and didn’t even know. It doesn’t hurt to be prepared. Stay healthy!