About E Cigarettes (Vapes) Smoking and Tobacco Use CDC E cigarettes used in about 5 percent of U.S. homes with kids UPI.com Are e cigarettes less harmful than conventional cigarettes? E cigarettes deliver aerosols differently and require particle level analysis to help answer this question. TSI Mini MOUDI Model 135 TSI Incorporated New Research on E Cigarettes and Heart Attacks Medical Associates of Northwest Arkansas