Getting people high by accident - second hand vapor

I work for a Pharmaceutical company , where we apply the placebo
method on test subjects . Before releasing the drug onto the market .
I totally buy into your theory of Psychosomantic or mind over matter
in a human being .

New laws maybe enacted over e-cigs and vapes ,
because it may be an intrusion of others' breathing space . Health
officials will have to weigh in on the policy of Public consumption .
Even if we/us don't believe there's an actual second hand exposure
that is harmful . The Gov. will deem it to be and e-ciggers and vaporists
will be designated to the same areas as smokers .

We seem to accept 2nd hand smoke as being feasible ,
but for some , just not 2nd hand vapors .

The effects of secondhand smoke tend to be cumulative over an extended period leading to prolonged exposure to carcinogens, not exposure to biologically active levels of nicotine.

Though the fear will likely overwhelm any other argument.

You dont want to be exhaling big clouds of vapour in a car with child - but that is just common sense surely?!

I have access to this through my academic account, but the abstract is here.


Abstract
A number of research studies have been published which have attempted to determine the relationship of the passive inhalation of marijuana smoke to the consequent production of urinary cannabinoids. At least superficially, most of these studies appear to support the proposition that passive inhalation should be seriously considered as a possible explanation for a positive urine test for marijuana. Examination of the experimental conditions that are required to produce positive test results indicates that passive inhalation does not have a major effect outside the laboratory and should not affect drug test results in the workplace.

And another in a Coffeeshop (extreme conditions)
"It could be demonstrated that all volunteers absorbed THC. However, the detected concentrations" were rather small. None of the urine samples produced immunoassay results above the cutoff concentration of 25 ng/mL. "


Abstract
Cannabinoid concentrations in blood and urine after passive exposure to cannabis smoke under real-life conditions were investigated in this study. Eight healthy volunteers were exposed to cannabis smoke for 3 h in a well-attended coffee shop in Maastricht, Netherlands. An initial blood and urine sample was taken from each volunteer before exposure. Blood samples were taken 1.5, 3.5, 6, and 14 h after start of initial exposure, and urine samples were taken after 3.5, 6, 14, 36, 60, and 84 h. The samples were subjected to immunoassay screening for cannabinoids and analyzed using gas chromatography-mass spectrometry (GC-MS) for Delta(9)-tetrahydrocannabinol (THC), 11-nor-hydroxy-Delta(9)-tetrahydrocannabinol (THC-OH), and 11-nor-9-carboxy-Delta(9)-tetrahydrocannabinol (THC-COOH). It could be demonstrated that all volunteers absorbed THC. However, the detected concentrations were rather small. None of the urine samples produced immunoassay results above the cutoff concentration of 25 ng/mL. THC-COOH concentrations up to 5.0 and 7.8 ng/mL before and after hydrolysis, respectively, were found in the quantitative GC-MS analysis of urine. THC could be detected in trace amounts close to the detection limit of the used method in the first two blood samples after initial exposure (1.5 and 3.5 h). In the 6 h blood samples, THC was not detectable anymore. THC-COOH could be detected after 1.5 h and was still found in 3 out of 8 blood samples after 14 h in concentrations between 0.5 and 1.0 ng/mL