Particle Size-Selective Assessment of Protection of European Standard FFP Respirators and Surgical Masks against Particles-Tested with Human Subjects

<div>PF-values against particles in size range of 0.093–1.61 <i>μ</i>m for FFP1, FFP2, and FFP3 respirators manufactured by company A. The tests were performed when the FFP respirators were donned on human subjects. Total observations are 30 (30 subjects). The boxplots show the following: dots (from bottom) represent 5% and 95% percentiles; horizontal lines (from bottom) represent 10%, 25%, 50%, 75%, and 90% percentiles. APF refers to the assigned protection factor for that particular mask.</div>

Journal of Healthcare Engineering

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Figure 3: Particle Size-Selective Assessment of Protection of European Standard FFP Respirators and Surgical Masks against Particles-Tested with Human Subjects 

Figure 3 | Particle Size-Selective Assessment of Protection of European Standard FFP Respirators and Surgical Masks against Particles-Tested with Human Subjects 