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  1. Article

    Open Access

    Discrepancy of particle passage in 101 mask batches during the first year of the Covid-19 pandemic in Germany

    During the first wave of Covid-19 infections in Germany in April 2020, clinics reported a shortage of filtering face masks with aerosol retention> 94% (FFP2 & 3, KN95, N95). Companies all over the world increa...

    Lukas T. Hirschwald, Stefan Herrmann, Daniel Felder, Anna M. Kalde in Scientific Reports (2021)