UK Study: UK researchers look at ascoiation between vapes and smoking in teens (Nothing Found < 1% of US adolescents who use e-cigs first were established cigarette smokers. They were less likely to be smokers than adolescents who tried other combustible or non-combustible tobacco products first) User mstave, in the e-cigs - Electronic Cigarette & Vaping subreddit, 30 Jul 2020