Please note that the title of this thread and the original weblink posted was the press release issued by the e-cig prohibitionist authors who also authored the fraudulent "e-cigs emit more carcinogenic formaldehye than cigarettes" article in the NEJM last month. The two so-called news articles (that were posted on this thread) simply repeated the false fear mongering claims made by the authors of this junk science.
The new Pankow junk study (also funded by class action lawyers, and that also concluded FDA should regulate/ban all e-cigs) at
Flavour chemicals in electronic cigarette fluids
actually found negligible nontoxic levels of chemicals in aerosolized e-liquid products containing flavors (that vapers inhale). But the authors deceptively and inappropriately compared those levels (as might be inhaled by a vaper) to NIOSH occupation exposure levels (which are for involuntary workplace exposures) for those same chemicals, and then concluded that the FDA should apply NIOSH (or similar) occupational limits as manufacturing standards for e-liquids.
In sum, that's like saying FDA should adopt NIOSH occupational standards for hundreds of chemicals in cigarette smoke as manufacturing standards for cigarettes, which would ban the sale of all cigarettes (since hundreds of chemicals in mainstream cigarette smoke greatly exceed NIOSH occupational exposure standards).
Another problem with the Pankow study is that is falsely assumed vapers consume 5ml of the exact same flavored e-liquid brand) every day.
While some frequent daily vapers may consume 5ml of e-liquid daily, the average daily vaper probably consumes 1-2ml of e-liquid daily, and most daily vapers consume more than one flavored liquid brand. I suspect that <5% of daily vapers (i.e. <.5% of people who have vaped in the past month and <.05% of people who have ever vaped) consume 5ml of the same flavored e-liquid brand daily.