I understand that the research is not all there currently regarding Vaping. But I found this article interesting. It’s from the Mayo Clinic and they postulate that Vaping is a gateway drug for smoking tobacco: Mayo Clinic Minute: Is vaping a gateway to smoking? - Mayo Clinic News Network
I was surprised that you were so positive about Vaping. My policy is 'when in doubt, recommend caution. If you are going to feel silly about being wrong, at least you don’t feel silly AND guilty about convincing people to do something that may turn out to be very unhealthy.