Smokers turn to vaping thinking that it is cooler and more convenient. Little do they realise that this seemingly convenient act could cause long-term damage, most of it irreversible. Scientists now fear that vaping could be linked to not one, but two forms of cancer. E-cigarettes can trigger lung and mouth cancer, and this is a consequence of the DNA-damaging chemicals found in vapes. Researchers at the University of New South Wales in Sydney came to this conclusion after reviewing studies on mice that developed lung tumours after being exposed to aerosol. Reports also suggest that heavy smokers are more prone to mouth cancer.Why are vaping pens linked to cancer?Vapour from pens has a relatively better fragrance compared to conventional cigarettes, as these pens are flavoured. However, researchers say that these pens contain chemicals that can cause cancer, damage DNA, and lead to tissue inflammation. Researchers also say that e-cigarettes contain nicotine, which is likely to trigger lung and mouth cancer. However, the extent of this effect in humans is still unknown.Read more: Parents Who Smoke May Be Passing Severe Lung Disease Risk To Their ChildrenLead researchers of the study said that they would only be able to determine the precise risk once long-term studies are available. Contrary to popular belief, while many believe that vaping is far safer than smoking, the study’s findings act as a warning for all those who use a vape but have not smoked a cigarette in their life. Experts at the University of Sydney noted that vaping is a safer alternative to smoking for smokers. However, the research has drawn criticism for being “problematic” and “misleading”.Experts at University College London said that no one would argue that e-cigarettes are completely risk-free. Rather, they said, vapes should be used as a harm-reduction tool to help smokers quit the habit, thereby reducing their risk of chronic and acute health problems, such as heart disease. The review, however, does not give a free pass to use e-cigarettes. It issues a warning against the use of vapes, citing risks of lung and oral cancer. At a time when vape use has increased suddenly, overtaking the popularity of smoking, research is necessary to discourage people, especially youngsters, from adopting the habit in the first place.