A comprehensive review of more than 100 studies has found that nicotine-vaping is likely to cause lung and oral cancers, according to the researchers from the University of New South Wales in Australia. The analysis found that human and animal studies, as well as cell experiments looking at the effects of chemicals found in vape liquid, all point towards carcinogenicity. While the exact risk cannot be quantified, the early signs are strong enough that scientists are warning against repeating mistakes made with cigarettes. The research was conducted by Freddy Sitas and Bernard Stewart, who believe this is the most definitive determination that those who vape are at increased risk of cancer compared to those who don't. The findings were published in Carcinogenesis.