I would have also pressed her for details of this "class" she took and I'll guarantee most members of ECF know far more about the positives and negatives in regards to vaping than this dental hygienist. My dental hygienist LOVES the fact I'm vaping and has noticed a HUGE diff in my oral health- when smoking had to go for a cleaning every 3 months and now I go every 6 months and it's a breeze. Previously gums were receding and are now fully recovered. My Dentist, who is a Dental Surgeon, also LOVES that I'm vaping and has actually given me some patients to convert...with success. My GP has also seen a HUGE impact in the improvement of my general health- has also asked me to speak to some patients about vaping. My Otolaryngologist (Ear, Nose and Throat Surgeon) also LOVES the fact I'm vaping and has also sent some converts my way. All of the above 4 professionals encourage me to vape in their office hoping their smoking clients will become interested. My Dentist and Surgeon's biggest concern, while I was smoking, was oral cancer. Bottom line is ALL 4 of them not only support vaping but encourage it.