Dr Rachel Orritt, from Cancer Research UK, said: "It's a really motivating idea that people who stop smoking might reap the benefits twice over - by preventing more tobacco-related damage to lung cells, and by giving their lungs the chance to balance out some of the existing damage with healthier cells." Follow James on Twitter.
Now for more women pipe smokers of the past: Dorothea (Dolley) Payne Todd Madison
We aimed to examine relative harm perceptions between IQOS, e-cigarettes, and cigarettes, among nicotine product users and non-users
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