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, Vaping linked with long term risk of respiratory disease in new study The electronic cigarette epidemic Chronic Disease Top 5 favorite pro vaping pro harm reduction studies. There are tens of thousands of them, but there are my five favorite most compelling studies done on the topic of nicotine vaping for tobacco Vaping Related Illness and Lung Disease NEJM Marijuana and Your Lungs: Is Vaping Safe for People with COPD?