cigarettes in military rations 7 ways used to be a lot better Why did US ration in
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Cigarette smoke also stains the teeth and causes bad breath

Its performance on 0.3-micron particles was, as expected, worse

Here's what I found from the United States Postal Service

Some people who come into contact with cigarette smoke may experience a number of common symptoms, including: coughing sneezing watery eyes While these allergy-like symptoms can be caused by tobacco smoke, this is not a result of an allergy to the smoke itself
The antihistamine diphenhydramine works by interfering with the actions of histamine in your body