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. 2021 Jan 20;11(1):e046199. doi: 10.1136/bmjopen-2020-046199

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© Author(s) (or their employer(s)) 2021. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

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Timeline of changes to national PPE guidance during the first peak of the COVID-19 pandemic in the UK. AGPs, aerosol generating procedures; FFP3, filtering facepiece 3; FRSM, Fluid-Resistant (Type IIR) Surgical Face Mask; HCW, healthcare worker; NHS, National Health Service; PPE, personal protective equipment. High-risk areas: intensive care unit, intensive therapy unit, high-dependency unit.