Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN Are Vapes Better Than Cigarettes? Are vape pens, or e cigarettes, ever the better option? Ohio State Health & Discovery Electronic cigarette Wikipedia E cigarettes linked with blood vessel damage National Institutes of Health (NIH) Smoking vs. Vaping: What You Need to Know The Vape Mall