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US 2015/Shutterstock Eugenia O’Kelly, University of Cambridge During the pandemic, the prevailing thought has been that a high-filtration mask – such as an N95, KN95 or FFP3 – should offer better protection than a surgical or fabric mask. However, recent research I conducted with colleagues at the University of Cambridge suggests this isn’t necessarily the case. For these masks to …
Read More »High-filtration masks only work when they fit – so we created a new way to test if they do
