Most smokers wrongly believe vaping is at least as harmful as smoking UCL News UCL University College London Vaping e cigarettes shown to be more harmful to lungs than smoking cigarettes new study Express.co.uk E cigarette vapor linked to cancer in mice National Institutes of Health (NIH) Learn the truth: vapes are not safe smoking alternatives Comparative study of lung toxicity of E cigarette ingredients to investigate E cigarette or vaping product associated lung injury ScienceDirect