JUUL E Cigarettes Harrison County Health Department Infographic: E cigarettes & Cardiovascular Disease World Heart Federation E cigarettes contain hazardous substances, addictive and harmful Vaping and E Cigarettes Causing Outbreak of Respiratory Illnesses, Other Severe Health Problems, and Deaths Sommers Schwartz Vaping has become common, but it's important to know what you're inhaling. Many e cigarettes contain nicotine, heavy metals like nickel and lead, and chemicals that can harm your lungs and overall health. Vaping and E Cigarettes ADAPP