Vaping Etiquette Guide: How to Vape Respectfully in Public SMOKO SMOKO E Cigarettes Health Risks of Secondhand Smoke and Aerosols Factsheet US EPA Vaping and Stroke Risk: New Study Hypes the Wrong Conclusion American Council on Science and Health Cigarette lectronique : Puff, un juteux business attaqu de toutes parts Capital.fr 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.