cigarette cause The harmful chemicals in smoking directly damage lung cells, causing DNA mutations that increase cancer risk. Over time, these damaged cells grow abnormally, leading to tumor formation in the lungs. Quitting smoking Effects Of Smoking - skillslondon2015
Description
E-cigs can provide that very same nicotine buzz that smoking does, but in a less harmful way

And then I quit

Pregnancy & Breastfeeding: What the Data Really Shows FDA pregnancy category: C (risk cannot be ruled out)
CONCLUSIONS Indonesian school boys, aged 1216 years, experience a rapid increase in smoking outcomes and a corresponding increase in smoking among their social circle

So its still unclear whether consistent exposure to secondhand nicotine and toxins, especially the low levels left by e-cigarettes, could be dangerous to someones health in the long term
