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Some studies suggest that using filtered cigarettes may cause individuals to inhale more deeply, potentially enabling the toxins to penetrate deeper into the lungs and exacerbate the harm caused by smoking

Nearly three million people in the UK now "vape" regularly - four times more than in 2012

BMC Psychiatry 19:28 PMID:30654783 Baker TB, Brandon TH, Chassin L (2004) Motivational influences on cigarette smoking

But Cuyahoga County's Health Commissioner Terry Allan says there's no definitive proof and disagrees

Instead, the research suggests, that over time, most of these dual users tend to revert to only smoking cigarettes