That will probably never happen, and I don't want it to happen. In order for it to happen, PVs would have to require a prescription, meaning the powers that be determine whether we're allowed to use them or not. That should NEVER happen. Doctors won't ever tell you to do anything that's cheap. I can't remember the last time a doctor actually told me to eat an orange, drink orange juice, take zinc, or any vitamin/mineral, for that matter. It's always robitussin, nyquil, or some stupid prescription drug. They never promote cheap health aids, and they never promote preventive healthcare anymore. It's really very sad...
Don't get me wrong. It would be very cool for them to suggest vaping to help fight/prevent colds and flus, but NOT if it's done by prescription only, and it's very doubtful that this will ever happen.