Dr. Glantz writes: "Evidence that e-cigarette aerosol has the same effects on an important measure of lung function as cigarette smoke undermines the assumption that e-cigarettes are uniformly less risky than conventional cigarettes."

If this study leads some smokers to smoke inside because they believe the researchers, who say that thirdhand smoke is no less harmful than secondhand smoke, then this could lead to serious public health harm to children.

1. That there is a causal link between traditional smokeless tobacco use and oral cancer; and

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