E Cigarettes: They May Help People to Quit Smoking, But What About Harm to Public Health? Cigarette lectronique Annecy (74) Blu All E Cigarettes Emit Harmful Chemicals, but Some Emit More Than Others Berkeley Lab Berkeley Lab News Center E cigarettes linked with blood vessel damage National Institutes of Health (NIH) Teens say they don't vape, they 'Juul.' That makes the activity hard to track Los Angeles Times