Boakye E, et al. The Promise and Peril of Vaping. Curr Cardiol Rep. 2020 Oct 9;22(12):155.
“Although e-cigarettes appear to be relatively safer than combustible cigarettes, they expose users to known harmful constituents whose long-term health risks remain unknown. While e-cigarettes have the potential to aid in cessation of cigarette smoking when used as part of a structured cessation program, use among tobacco-naive youth and long-term dual use with combustible cigarettes should be strongly discouraged due to excess risk with dual use.”
Comment: E-cigarette health risks short-term are visible and known for some groups and unknown long-term for the whole population, so caution would indicate their restriction or prohibition. Stephen Hamann
https://link.springer.com/article/10.1007%2Fs11886-020-01414-x
Stephen Hamann