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What is the efficacy of standard face masks compared to respirator masks in preventing COVID-type respiratory illnesses in primary care staff? - The Centre for Evidence-Based Medicine
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Sports despite masks: no negative effects of FFP2 face masks on cardiopulmonary exercise capacity in children | European Journal of Pediatrics
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Comparison of Mask Ratings, Standards, and Filtration Effectiveness (N95, KN95, FFP1, FFP2) – Smart Air
To shield against pollution and viruses – take cover with protective face masks – made possible with plastics - Borealis
Explainer: N95? KF94? Which mask is best at protecting against COVID-19 | Reuters
PPE – Understanding Different Types Of Masks - DD News - DD
COVID-19: A guide to face masks - DentalNursing
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N95 masks, KN95 and FFP2: a comprehensive guide to the differences between them | Pixartprinting
Face mask, face shield, FFP2, N95 — what's the difference? – DW – 06/29/2021
What are N95 and FFP2 face masks? | WIRED UK
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Respirators for protection against Coronavirus – Find general information here - Moldex - Moldex Europe
Air seal performance of personalized and statistically shaped 3D-printed face masks compared with market-available surgical and FFP2 masks | Scientific Reports
What are FFP2 masks, mandatory in some European countries?
Germany weighs up mandatory FFP2 masks in shops and on transport | Coronavirus | The Guardian
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