Study Shows Vapor Exhale is ‘Liquid Droplets’ That Disappear Within Seconds

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This image shows the decay of aerosol concentration at a bystander’s inhalation point after an exhalation of an e-cigarette puff at various distances. Photo by Fontem Ventures

Unlike analog cigarette smoke, vapor exhaled from e-cigarettes contains particles that are liquid droplets that evaporate within seconds, according to research from Kaunas University of Technology in Lithuania, EMPA Swiss Federal Laboratories for Materials Science and Technology, ETH Zurich the Swiss Federal Institute of Technology and Fontem Ventures. The study was presented at the 4th Workplace and Indoor Aerosols conference in Barcelona. According to Science Codex, it’s the first study of its kind to look at particles in exhaled e-cig vapor.

Professor Dainius Martuzevicius, vice dean for research at the Faculty of Chemical Technology, Kaunas University of Technology and leading expert on indoor air quality, said at the conference: “There is little data available on the properties of exhaled e-cigarette ‘particles’ in the scientific literature and as a result there is a growing discussion amongst the public health community as to whether the ‘particles’ exhaled following use of vaping products have potential implications for indoor air quality.”

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