conclusion about cigarette smoking Really interesting article the potential for e-cigarettes as harm reduction for smoking. The puts it so well Conclusions | Springer Nature Link
Description
Food and Drug Administration (among other national authorities) has acknowledged that, while not risk-free, e-cigarettes expose users to far fewer toxic substances than combustible tobacco

Smoking in all shared areas of the ship as well as cabins are restricted

NPR.org
According to the TSA, you are only allowed to fly with a vape or e-cigarette when you pack it in your carry-on baggage, not your checked luggage

Mutations in TP53, KRAS, and STK11 are more frequent in tobacco smokers with lung cancer, whereas EGFR and HER2 mutations and the ALK-ELM4 fusion are more common among LCANS [145]
