Nicotine delivery to users from cigarettes and from different types of e cigarettes Psychopharmacology Springer Nature Link Tobacco Control Chronic Disease Prevention & Health Promotion Division Electronic Cigarettes An Overview of E Cigarette Impact on Reproductive Health While vaping is not risk free, it is less harmful than tobacco Our World in Data Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London Notes from the Field: Use of Electronic Cigarettes and Any Tobacco Product Among Middle and High School Students United States, 20112018 MMWR