countries by cigarette consumption Tobacco Use Around the World – Landgeist Smoking prevalence by country 2020|
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It is a little uncharacteristic for Dagny as a Rand character, since Rearden later says that lying compromises ones reality but maybe this is more of a humorous lie, or not a lie because on some level they both know the truth

The matter of legal vs smuggled cigarettes is not an either/or question because it is the governments job to restrict smuggling and to look out for the wellbeing of its citizens

Canadian Tobacco and Nicotine Survey 2019 Statistics Canada 2020d Vaping is the act of inhaling and exhaling vapour produced by a device such as an electronic cigarette (e-cigarette), vape mod, vaporizer or vape pen
(1993b)
We constructed these smuggling rates to be positive when they involve a net export of smuggled cigarettes out of the state and negative when they involve a net import of smuggled cigarettes into the state

CNN Health further highlights an additional UK study that sheds light on the short and long-term effects that smoking can have on peoples immune system, putting them at higher risk for developing diseases and infections