Teen vaping rising fast, and Harvard official is concerned Harvard Gazette Four In Ten Smokers Wrongly Believe Vaping Is As Harmful or Worse Than SMOKO E Cigarettes Cigarette smokers who try to quit often end up vaping and smoking WashU Medicine Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN Vaping substantially less harmful than smoking, largest review of its kind finds King's College London