Varied disinfection methods accessible to the general public were investigated for their effects on filtration performance. Without disinfection treatments, both respirators showed very high filtration efficiency of ≥99.5%. It should be noted that the filtration efficiency was measured after challenging the respective aerosols for 3 min (by the KF standard) [35], which corresponded to about 2.7 mg of NaCl and 8 mg of paraffin oil mass. The filtration performance against NaCl and paraffin oil aerosols were comparable, and the effects of various treatments on filtration of either aerosol were very similar (Figure 2).