If you vape, you inhale a lot of harmful substances. These can damage your heart and lungs. Should I Be Concerned About Secondhand Vaping? Vaping Safety, Smoking, Dangers, Pros, Cons, Debate, E cigarettes, & Tobacco Britannica Vaping might feel safer than smoking but what's really happening inside our lungs? The EVALUATE study led by the @unibirmingham will be the first to track ex smokers over a whole year