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"Our estimation of a cigarette equivalent for alcohol provides a useful measure for communicating possible cancer risks that exploits successful historical messaging on smoking," lead study author Dr Theresa Hydes, of the Department of Gastroenterology and Hepatology at the University Hospital Southampton NHS Foundation Trust , said in a statement

When you quit, the immune system starts returning to its natural baseline

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van der Eijk Y, McDaniel P, Glantz S, Bialous S

Dangerous chemicals : E-cigarette liquid often contains harmful substances such as diacetyl , which can cause lung disease, volatile organic compounds (VOCs) , and heavy metals like lead