I suppose if something is being shedded in proximity to others, it could easily be inhaled. The following link from NIH is interesting, and perhaps somehow related, but honestly, I have no idea if it's relevant.Posted by Journeyman (here)
Is a shedding vaccine almost an argument against this being a deliberate exercise in depopulation? If the vaccines are a bio weapon deployed by other humans, would they release something which could infect them or people they wish to retain?
Passive inhaled mRNA vaccination for SARS-Cov-2