Trump ban on flavoured e cigarettes as underage vaping soars" inside page article in Guardian newspaper London England UK 13 September 2019 Stock Photo Alamy E cigarettes contain hazardous substances, addictive and harmful E cigarettes are changing how nicotine is consumed and perceived. Patterns of use often differ from traditional smoking, with more frequent and prolonged exposure throughout the day. This raises questions about cumulative Exposure to e cigarette advertising and young people's use of e cigarettes: A four country study