Fortunately, the vast majority of the public appears to have better scientific judgment than the FDA and to recognize that cigarette smoking is far more hazardous than the use of an electronic nicotine delivery system that merely aerosolizes nicotine from a propylene glycol solution that is completely free of any tobacco or any combustion.

The rest of the story is this study actually found no effect of electronic cigarette use on pulmonary function tests, indicating that there was no clinically significant observable effect of vaping on lung function. Specifically, the study found "no differences between basic pulmonary measurements" between the two groups, demonstrating that acute exposure to electronic cigarette vapor did not affect FEV1, FVC, PEF or MEF50 and MEF75."

The authors admit this in the paper. They write: "This is a cross-sectional study, which only allows us to identify associations, not causal relationships."

The CDC's response:

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