tobacco chemistry What products contribute to thirdhand chemical residue? The Chemistry of Tobacco –
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The first volume, Strauss on Nietzsches Thus Spoke Zarathustra, will appear in bookstores in October 2017
Publications and reports of the Surgeon General

Cigarette packaging boxes differ according to brand, type, and according to regional regulations
I think part of it is that its a drug many of us start with, and its there throughout the whole process

This article was updated to include Hannity's tweet about vaping.

First, they are usually under constant control in a humidity (and often temp) controlled environment, and second, any spot of mold (often it isn't even mold but just normal bloom) is just along the outer wrapper and easily wiped away