In addition, avoiding direct comparison between the harms of traditional cigarettes and ENDS is recommended due to existing uncertainties, in particular those related to the high prevalence of dual or multiple product use, the variability of types/generations of ENDS and in their levels of nicotine content, and to a lack of rigorous and standardised comparative studies
Globally, exposure to SHS remains a major public health concern
It also increases the risk of gum-related diseases, tooth decay, and oral cancers all are associated with halitosis
Neuropharmacology 24:11351137 Berridge MS, Apana SM, Nagano KK, Berridge CE, Leisure GP, Boswell MV (2010) Smoking produces rapid rise of [11C]nicotine in human brain