There have actually been numerous studies on that fact. The 27-page report that I've provided the committee goes over that very specific thing.
The fact of the matter is that it's true that it's not simply water vapour that is emitted. There are propylene glycol, a very minimal amount of nicotine, and some other constituents, but because vapour dissipates so quickly in the atmosphere it doesn't have any type of biological effect upon inhalation by a bystander. That's been shown over numerous studies. As I've said, I have cited those studies, and they are in that report.