Frontiers Direct health implications of e cigarette use: a systematic scoping review with evidence assessment New study comes the closest yet to proving that e cigarettes aren't as dangerous as smoking Each year, #tobacco kills 1.1 million people in the WHO European Region. Of those, 153 000 are caused by exposure to second hand smoke. Tobacco is responsible for 25% of all cancer deaths The cigarette and e cigarette: University of Kentucky reference Download Scientific Diagram