Public Health Consequences of E Cigarettes Vapes '95% safer' than cigarettes messaging backfired E cigarette Vaping Q&A Allegro Pediatrics E cigarettes contain hazardous substances, addictive and harmful Vaping is often marketed as a safer alternative to smoking, but many vape products contain nicotine, harmful chemicals, and heavy metals that can harm developing brains and lungs. Health Risks of Secondhand Smoke and Aerosols Factsheet US EPA