About E Cigarettes (Vapes) Smoking and Tobacco Use CDC From cigarettes to e cigarettes: The evolution of tobacco use in the United States 4 H Healthy Youth While e cigarettes, or vapes, may contain fewer chemicals than regular cigarettes, they are still NOT safe. E cigarettes contain harmful chemicals. 99% of e cigarettes contain nicotine, making them highly addictive. Visit https: t.co 1y8cZxtgFQ to Know the facts about e cigarettes E Cigarettes and Vaping E Cigarettes and Lung Health American Lung Association