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 B. The tests were performed when the FFP respirators were donned on human subjects. Total observations are 30 (30 subjects). The boxplots show the same as in Figure <a href="../fig3/">3</a>. AFF refers to the assigned protection factor for that particular mask.</div>

Journal of Healthcare Engineering

fig4

Figure 4

Figure 4: Particle Size-Selective Assessment of Protection of European Standard FFP Respirators and Surgical Masks against Particles-Tested with Human Subjects 

Figure 4 | Particle Size-Selective Assessment of Protection of European Standard FFP Respirators and Surgical Masks against Particles-Tested with Human Subjects 