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

Figure 5

PF-values against particles in size range of 0.093–1.61 μm for three models of surgical masks: C, D, and E. The boxplots show the same as in Figure 3. The tests were performed when the surgical masks were donned on human subjects. Total observations are 30 (30 subjects).

(a) Surgical mask C

(b) Surgical mask D

(c) Surgical mask E