Low Risk of Passive Vaping

Posted 10th May 2016 by Dave Cross
Two studies have been released looking at the issue of passive vaping. Californian public health “experts” would have you believe that not only is there a second-hand vape problem – but there’s also a third-hand one via surface residues. Here we present the latest evidence from Australia and Switzerland.

Australia has a de facto ban on vaping and, in Simon Chapman, possesses an “expert” to rival our own Martin McKee. The inverted commas are being used to signify a slight disbelief that anybody could consider them to be experts given the kind of things they come out with. So, to the first: a study carried out by the Health Risk Policy Unit in Sydney.

The researchers claim: “little is known about the potential adverse health effects of passive exposure to EC vapour.” Rather than add something to the claimed lack of knowledge, the team decided, “to summarise and review all studies that have examined potential adverse health effects of passive exposure from inhaling EC vapour.” They found just 312 studies to look at before settling on analysing sixteen of them.

From this small number they claim to have discovered: “A variety of study designs were used to investigate potential health risks from passive exposure to EC vapour. These included direct exposure studies involving humans and animals, and indirect exposure studies using volunteer EC users or smoking machines. The majority of studies determined that passive exposure to EC vapour may pose a health risk to bystanders. All papers encountered a number of limitations.”

The team concluded that although they believe there to be a “potential to lead to adverse health effects”, they admit that “the risk from being passively exposed to EC vapour is likely to be less than the risk from passive exposure to conventional cigarette smoke.” In short, researchers claim little is known and add nothing to the knowledge base.

This contrasts starkly with proper science taking place at the EMPA Swiss Federal Laboratories for Materials Science and Technology. In this study, they used a chamber to simulate a room in order to measure actual vapour particulate size, concentration and distribution. They installed a body-temperature dummy to represent a person in the room and also took measurements outside the chamber to minimise vapour losses through diffusion.


Upon the vapour being released, the team noted: “a rapid increase in the particle concentration during 2-5 second interval was followed by a rapid decrease in the concentration,” in the region surrounding the vaper. They observed that concentrations were much less the further away from the dummy, but also took longer to disperse.

They concluded: “This study shows for the first time exhaled e-cigarette particles are liquid droplets that evaporate rapidly upon exhalation. The results presented here may have a positive implication for continued use of e-cigarettes in indoor areas.”

In response, Huffington Post wrote: “researchers found that indoor vaping is ‘unlikely’ to pose a risk to the air quality of a room.”

Graph by Fontem Ventures

 Dave Cross
Article by Dave Cross
Freelance writer, physicist, karateka, dog walker
Eternal Vape