It is typically a mixture of water, food grade flavoring, a choice of nicotine levels, cannabis (THC, CBD), propylene glycol (PG) or vegetable glycerin (VG)
before joining Boston Universitys School of Public Health
It can also transfer from a mother to child during pregnancy
Weve also seen substantial declines in childhood cancer mortality, even though childrens cancers arent caused by smoking, but typically by inherited or spontaneous genetic mutations very early in development
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According to the American Heart Association, the science behind nicotine addiction is clear, yet many people still do not realize cigarettes are as hard to quit as cocaine or heroin