Quick Answer If you are considering deploying a tobacco or vape vending machine in the United States, the short answer is: it is legally possible in a narrow set of circumstances, but the regulatory environment is strict, state-specific, and changing rapidly
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References Spitzer, J., "My Cigarette, My Friend," WhyQuit.com, Joel's Library, 1990. Studies first noted in PubMed during March 2008: Vaglenova J, Parameshwaran K, Suppiramaniam V, Breese CR, Pandiella N, Birru S