Up in a Puff of Smoke?

There has been a suggestion, from a select committee, that the current UK laws on vaping (in England) should be relaxed (to include places like railway stations and areas within hospital grounds) on the bases that a) vaping is much less toxic than cigarette smoking; b) vaping can help some people stop smoking carcinogenic tobacco products and c) Smoking is particularly common in people with mental health issues (https://www.theguardian.com/society/2018/aug/17/relaxing-e-cigarette-laws-would-cut-smoking-deaths-say-mps). Having said that, there is little doubt that tobacco companies see this as a way of maintaining their profits at a time with declining cigarette sales. There are remaining problems as a) vaping may not be without negative health effects (a recent study suggests an impairment of the immune system); b) passive breathing of vaping fumes may influence the health and enjoyment of people in the immediate vicinity (including children) and c) making vaping possible in public areas may encourage its use (and even lead to eventual cigarette smoking). I am note that it has recently proved very difficult to get a relaxation of cannabis-derived medications in the UK to treat serious medical conditions (such as some types of epilepsy). If nicotine was a recently utilised drug, rather than one that has been around for centuries, I suspect that it would be hard to get vaping concoctions licensed for use anywhere.