In the 1970s, scientists at RJ Reynolds were trying to figure out why their competitors cigarette brand was outselling Winston cigarettes, so they reverse engineered the Marlboro, and discovered that, by adding ammonia to the tobacco, Phillip Morris was raising the alkalinity and creating free nicotine, which was rapidly absorbed getting to the brain faster than an intravenous injection
Robertson placed groups of mice in a chamber and sprayed its air first with propylene glycol, then with influenza virus
Because people who smoke associate the habit with so many parts of their day, from when they wake up, to relieving stress at work, or a dopamine hit after dinner, this can create doubt and fear of breaking that routine or mindset
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The Kandels mention the possibility that teenagers who otherwise would never smoke tobacco might decide to do so after trying e-cigarettes, even though the research they are discussing has nothing to do with that issue