E Cigarettes (Vapes) Smoking and Tobacco Use CDC While vaping is not risk free, it is less harmful than tobacco Our World in Data Evidence, alarm, and the debate over e cigarettes Science E cigarettes around 95% less harmful than tobacco estimates landmark review GOV.UK Smoke without fire: What's the truth on e cigarettes? New Scientist E cigarettes: Mounting evidence shows the dangers of these new age devices School of Public Health