e Cigarettes Safety Not Yet Proven CANSA The Cancer Association of South Africa CANSA The Cancer Association of South Africa A scientific review has raised fresh concerns about the long term cancer risks of vaping, concluding that e cigarettes are probably carcinogenic, while also acknowledging significant gaps in the evidence. The analysis of reviews Moffitt Cancer Center Studies How E Cigarettes Help Smokers Quit Moffitt 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 L'e cigarette cancrigne ?