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E-cigarettes: an evidence update <br /> <br />62 <br />Summary of findings <br />Although the majority of adults and youth still correctly perceive EC to be less harmful <br />than tobacco cigarettes, there has been an overall shift towards the inaccurate <br />perception of EC being at least as harmful as cigarettes over the last year, for both <br />groups. Intriguingly, there is also some evidence that people believe EC to be less <br />harmful than medicinal nicotine replacement therapy (NRT). <br /> <br />Policy implications <br />o Clear and accurate information on relative harm of nicotine, EC and tobacco <br />cigarettes is needed urgently (see also Chapter 10). <br /> <br />o Research is needed to explore how health perceptions of EC are developed, in <br />relation to tobacco cigarettes and NRT, and how they can be influenced. <br />8. EC, nicotine content and delivery <br />