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"The take home message is that all smokers should stop smoking, even if they smoke only occasionally, or if they smoke very few cigarettes a day," Jean-Francois Etter, a researcher at the University of Geneva in Switzerland who wasn't involved in the study, said in an email

Michael Bloomberg, the former mayor of New York, pledged that his foundation will spend $160m fighting youth vaping, while Donald Trump has unveiled plans for a ban on flavoured e-cigarettes to protect, as he put it, innocent children

Studies have linked secondhand exposure to vaping aerosols to health issues, but the exact risks remain unknown, researchers told PolitiFact

Cravings can reappear months later due to psychological triggers, not physical withdrawal

They can also gauge your refrigerant charge to see if that could be part of the problem