E-cigarettes have helped us smoke less and smoke more.
But for most people, the technology is not for them.
As a rule, smokers who switch to vaping don’t want to stop smoking entirely.
The nicotine levels in e-cigarettes vary widely, but the nicotine content in the vapors can be high enough to cause severe harm to the lungs.
But the average user doesn’t want that.
We need to look at this with a more scientific lens, said Dr. Peter H. Klapstein, director of the tobacco control program at the National Cancer Institute.
In a paper recently published in the Journal of the American Medical Association, Dr. Klapsstein looked at how e-cigarette users fared in various lung cancer studies.
The studies are called prospective cohort studies.
For the study, Drs.
Klampsstein and Dr. Andrew D. L. Kuznets analyzed data from about 3,000 people who used e-cigs or e-liquid in the early years of their disease.
The researchers asked the people whether they had tried smoking for the previous year and how long it had been since they had smoked.
If the answer was yes, the researchers asked about the number of cigarettes they had ever smoked and whether they were smokers or nonsmokers at the time of their lung cancer diagnosis.
The people who had used e