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We also observed that when patients ceased vaping, they had a partial reversal of the condition over one to four years, though not complete due to residual scarring in the lung tissue. A huge increase in vaping, particularly among young adults and adolescents, has occurred in the United States, with studies showing about 9 percent of the population and nearly 28 percent of high school students are e-cigarette users

Tobacco Regulatory Science

But cigarettes contain tobacco wrapped in paper, or another material that does not contain tobacco

Since we investigated on acute effects, we did not monitor participants after the last study visit