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These decreases in smokers resulted in an estimated savings of as much as $4.2 billion in personal health care expenditures and ultimately a healthier workforce with increased productivity and fewer sick days for employees and their employers

That said, vaping isnt entirely without risk

This study again showed a very clear positive association between egg intake and diabetes, one that was independent of confounding variables including age, sex, race, a family history of diabetes, glucose tolerance at baseline energy expenditure, smoking, and energy intake

These products use an e-liquid that may contain nicotine, as well as varying compositions of flavorings, propylene glycol, vegetable glycerin, and other ingredients

PMID 24278273