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. 2020 Nov 25;476(2243):20200469. doi: 10.1098/rspa.2020.0469

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© 2020 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 9. — Filtration test results showing penetration P(t) (%) versus time (hours) over 12 h duration for (a) N95 FR with charged (open black symbols) and neutral (filled black symbols) aerosols at 30 l min⁻¹ (circles) and 85 l min⁻¹ (squares) flow rate and (b) commercial surgical mask (SM) taped (filled black symbols) and not taped (open black symbols) around manikin head at 30 l min⁻¹ (upright triangles) and 85 l min⁻¹ (inverted triangles).