I'm guessing that if this really is associated with vaping then it's likely due to the limited regulation of the ingredients. Bad batch of VG/PG/nicotine? Some problematic flavouring? I think the best article I've found is at the BMJ: https://www.bmj.com/content/366/bmj.l5228 - sorry, paywall. Very much inconslusive at the moment completely in the public health triage stage. Good idea to regulate it properly. I just…
Similar story here. Smoked for ten years. Actually found it easy to replace smoking with vaping (strong menthol). Stopped vaping after 1 year because I was suffering from GERD and suspected that vaping was an attributing factor. Since I stopped 5 years ago, my GERD symptoms have more or less disappeared. I really enjoyed vaping, probably more than smoking, but somehow it did not seem to have the same addictive effect…
The addictive effect of nicotine seems much enhanced by the addition of a monoamine oxidase compound (ie related to the early antidepressant drugs) - which is present in burning tobacco - which seems to take nicotine from approximately as addictive as caffeine to more addictive than heroin (citation available).