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Pros The most effective at removing PM2.5 and PM10 particles in our tests Quiet operation Washable pre-filter Cons May not be suitable for large spaces WHY WE LOVE IT: Blue Pure 311i+ Max tops our winner's list of the best all-purpose air purifiers, so it's no surprise that it's also our favorite for capturing smoke within the home

These results are supported by the findings of an in vitro study which exposed human lung adenocarcinoma epithelial cells (A549) to increasing levels of electronic cigarette vapour extract concentrations: 100% vapour extract with one in ten serial dilutions

But the mechanism by which cigarette smoke affects the gastrointestinal system was not known