Comparison of adverse health effect, safety issue and regulation of Download Scientific Diagram Analysis suggests e cigarette use may be linked to lower rates of smoking Vaping and E Cigarettes Causing Outbreak of Respiratory Illnesses, Other Severe Health Problems, and Deaths Sommers Schwartz Health Risks of Secondhand Smoke and Aerosols Factsheet US EPA First comparison of dangers of tobacco cigarettes, e cigarettes and waterpipes Vaping, Environmental Toxicants Exposure, and Lung Cancer Risk