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25. October 2017
Yes, it has been shown that ultrafine dust particles including nanoparticles can cross the ultrathin tissue barrier in the lung thereby entering the body via the bloodstream. However, less than one-thousandth of the initially inhaled particles actually end up in the bloodstream so the amount is negligible.
- Further information on this topic is provided in the body barriers article “nanoparticles and the lung“!