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Greater e-cigarette use among disadvantaged ex-smokers Our research also showed a different pattern among smokers who had been quit for over a year, with disadvantaged ex-smokers more than twice as likely to use an e-cigarette

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But a Public Health England evidence review, carried out in February 2018, found that despite some experimentation among never smokers, e-cigarettes do not appear to be undermining the long-term decline in cigarette smoking in the UK among young people

Untangling exactly who is behind the Philadelphia-area venture has proven difficult