How Switching to E Cigarettes After Smoking Cessation Affects Lung Cancer Risk Cancer screening adherence among e cigarette users in the United States E cigarettes contain hazardous substances, addictive and harmful 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 Smoking affects more than one organ. It can silently increase the risk of multiple cancers and long term health complications, often before symptoms even begin to appear. Tobacco use is directly linked to Most E cigarette Users Ages 18 to 29 Never Smoked Before American Cancer Society