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

Figure 6

The association between fit factors and protection factors. The associations for FFP respirators, surgical masks, and total (all respirators combined) are presented, respectively, in (a), (b), and (c).

(a) FFP series

(b) Surgical masks

(c) Total