A scientific review has raised fresh concerns about the long term cancer risks of vaping, concluding that e cigarettes are probably carcinogenic, while also acknowledging significant gaps in the evidence. The analysis of reviews Rethinking Vaping Understanding the Hidden Health Risks of Vaping UL Research Institutes Strongest evidence yet that vaping likely causes cancer Disposable E Cigarettes More Toxic Than Traditional Cigarettes UC Davis Scientific review finds e cigarettes likely cause lung and oral cancer