![]() ![]() 9 Recent studies suggest daily ENDS users may face increased cardiovascular and respiratory risks, 10 with dual users (DUs) of combustible cigarettes and ENDS facing even greater risks than combustible-only users. While smokers who transition completely from smoking to ENDS use may decrease their exposure to toxins created by combusting tobacco, ENDS use is not risk-free. As ENDS use grows, exposure to SHA also increases, 7 with a recent analysis of 2015–2018 National Youth Tobacco Survey data showing around a quarter of US youth had been exposed to SHA. 4 5 However, while norms regarding SHS are becoming established, 6 it is not clear whether smokers who start vaping apply those norms to the secondhand aerosol (SHA) created by electronic nicotine delivery systems (ENDS). 1–3 Smoke-free home norms reduce non-smokers’ exposure to SHS, increase the likelihood that smokers will make a quit attempt, and foster the success of those attempts. Knowledge of harms caused by exposure to secondhand smoke (SHS) has informed campaigns promoting smoke-free homes and policies mandating smoke-free cars when children are present, which in turn shape norms, the informal rules that guide social practices. ![]()
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