Use of e cigarettes after quitting smoking increases lung cancer risk Cancerworld Magazine e Cigarettes Safety Not Yet Proven CANSA The Cancer Association of South Africa CANSA The Cancer Association of South Africa E Cigarettes and Breast Cancer: Is Vaping Really Safer? How does smoking cause cancer? Cancer Research UK Exposure to PM2.5 and E cigarette can potentially put you at greater risk of lung cancer . Both exposure to PM2.5 air pollution and e cigarette use are linked to an increased risk of Prevalence of cigarette and e cigarette use among U.S. adults eligible for lung cancer screening based on updated USPSTF guidelines ScienceDirect