In the 1970s, the tobacco industry perpetuated the myth that some brands of cigarettes were safer than others. Perhaps because of differences in nicotine or tar delivery. Or perhaps because of differences in additives. But the public health community knew that was hogwash and didn't buy it. In fact, eventually the federal government filed a lawsuit against the tobacco companies, arguing that their public statements insinuating that some cigarette brands are safer amount to conspiracy to commit fraud. The tobacco companies found themselves guilty of racketeering and will now have to issue a corrective statement indicating that even major differences in cigarette ingredients do not render them significantly different in terms of the overall public health risk that they pose.

"these studies will also help adult smokers understand that their family members are severely affected if they undergo surgery and return to a THS-polluted environment because their healing process will be not only be altered but will also be significantly delayed. ... the proposed work will benefit the public by providing a better understanding of the cause of impaired healing among individuals who are constantly exposed to Third Hand Smoke, i.e. smokers themselves, children and elderly parents in households of smokers, waiters and waitresses in bars and housekeepers in hotels or houses of smokers."

To be completely honest, Trueba et al. actually found that not only did taking an exam affect nitric oxide levels, but it also produced decreases in lung function measured by spirometry. This is something that has not been observed for electronic cigarettes.

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