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Research by the University of Bristol has found that the association between smoking and e-cigarette use could be explained by a broader genetic susceptibility to risk-taking.

The findings imply that the genetic influences associated with people taking up smoking also influence people being e-cigarette users; these were also found to be associated with risk-taking behaviours more generally, such as externalising disorders in childhood. Dr Jasmine Khouja [...] said: “There is concern that young people who are non-smokers might be more likely to become a cigarette smoker if they have access to e-cigarettes.