"Congratulations to all the tens of thousands of vapers out there who have quit smoking using electronic cigarettes. You have helped to improve your health and perhaps save your life. You have taken the most important step in improving your health. And you have done a tremendous favor for your family, friends, and loved ones."

The degree to which electronic cigarettes stimulate or depress overall interest in quitting is a separate and empirically answerable question. In fact, evidence from the UK indicates that the spread of electronic cigarettes has been associated with a in the desire to quit smoking at a population level.

Vince Rennich is a casino floor worker who at age 47 was diagnosed with lung cancer due to 25 years of heavy exposure to secondhand smoke, which he described as working in "a modern-day coal mine." "A good majority of the time, I'm surrounded in a cloud of smoke," he said.

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