Vaping Possible Negative Effects on Lungs: State of the Art From Lung Capacity Alteration to Cancer Cureus Just How Harmful Is Vaping? More Evidence Is Emerging. The New York Times CoEHAR Replica study: "Claim that e cigarette aerosols make cancer cells more resistant to chemotherapy debunked!" CoEHAR How to Choose the Best Vape Pen for Your Needs Roundup: Nicotine Based E Cigarettes Linked to Risk of Lung, Oral Cancer; and More News Many people believe that vaping is less harmful than smoking, but that's a common misconception. In fact, in addition to nicotine, vapes can contain toxic chemicals that could be linked to cancer,