More Evidence Of Harm Reduction With E-Cigarette

It looks like there's more evidence of harm reduction with e-cigarettes, when compared to combustible cigarettes. Certainly instinctively one would believe e-cigs are safer than cigarettes, the presence of evidence is helpful.

"Conclusion: Former smokers with long-term e-cigarette–only or NRT-only use may obtain roughly similar levels of nicotine compared with smokers of combustible cigarettes only, but results varied. Long-term NRT-only and e-cigarette–only use, but not dual use of NRTs or e-cigarettes with combustible cigarettes, is associated with substantially reduced levels of measured carcinogens and toxins relative to smoking only combustible cigarettes." 

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Source: ​http://annals.org/aim/article/2599869/nicotine-carcinogen-toxin-exposure-long-term-e-cigarette-nicotine-replacement