A recent study found that about one in 20 American adults used e-cigarettes and one in three users vaporized daily.
Researchers report in the Annals of Internal Medicine that e-cigarettes are used more frequently in younger adults and current cigarette smokers. Reuters reports that of the 10.8 million people who use e-cigarettes, more than half are younger than 35 years old.
The use of e-cigarettes is high-risk, including the use of traditional cigarettes, according to Reuters
"The most common usage pattern in the US is dual-use, ie the current use of traditional cigarettes and electronic cigarettes" said Michael Blaha, a senior study author. [1
According to the study, 14.4% of current smokers use e-cigarettes, while 1.4% of e-cigarette users never smoke traditional cigarettes. Vaping is also common in adults with chronic health problems, according to the study.
The more people vape, the more e-cigarettes are scrutinized. While the health risks of e-cigarettes are not completely clear, the chemicals they contain may pose some risk.