Suzi chats to Professor Linda Bauld from the University of Edinburgh about e-cigarettes and vaping. Linda provides an update on what's changed in the last 2 years since the first E-Cigarettes episode - in terms of who's using them, whether they are helping in smoking quit attempts, and what some of the new products on the market are like. Suzi and Linda also discuss nicotine itself, and the evidence as to whether or not it's harmful. They also touch on some of the reasons why the USA and the UK have such different policy attitudes towards vaping, and what some of the implications of this might be.