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Dubious evidence of heart and cancer deaths due to passive smoking

First of all, all studies refer to smoking and not nicotine

The study also found that even at low concentrations the chemicals caused blood vessel inflammation

Indeed, although many studies have clearly shown that several interventions including pharmacological therapy and lifestyle modifications improve endothelial function under the condition of relatively mild vascular endothelial dysfunction [8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35], we have shown that advanced endothelial dysfunction is not reversible even by appropriate pharmacological therapy [94]

This is sometimes called thirdhand smoke

PMC 1447076