Elevated Toxic Element Emissions from Popular Disposable E Cigarettes: Sources, Life Cycle, and Health Risks ACS Central Science Chemicals Study shows second hand vaping exposure very low compared to second hand smoking Sharp rise in use of high strength vapes, research shows Proportion of adults using e cigarettes containing up to 20mg ml of nicotine has increased to 32.5% from 6.6% in 2021 : r science Nicotine delivery to users from cigarettes and from different types of e cigarettes Psychopharmacology Springer Nature Link