Clearing the Air: The Harsh Reality of Vaping and Smokeless Products Leading to Cancer e Cigarettes Safety Not Yet Proven CANSA The Cancer Association of South Africa CANSA The Cancer Association of South Africa Most E cigarette Users Ages 18 to 29 Never Smoked Before American Cancer Society Vaping can cause cancer, say researchers but still isn't as damaging as smoking cigarettes. More than 5.5 million Britons currently use e cigarettes, which have long been viewed as a safer alternative