Vaping Around Children Exposes Less Nicotine Than Smoking Ecigator Nicotine delivery to users from cigarettes and from different types of e cigarettes Psychopharmacology Springer Nature Link An Overview of E Cigarette Impact on Reproductive Health Electronic nicotine delivery systems (ENDS): A convenient means of smoking? ScienceDirect A new study published in Nicotine & Tobacco Research found that those using e cigarettes alone were more than twice as likely to develop COPD than people who didn't use any tobacco products, Secondhand vape exposure: Risks and side effects