Figure 6  Numerical analysis of bacteria for each layer of Resp. A with varied treatments. (A) Monochrome calibrated images of coverweb and stiffener with bacteria cells, and (B) quantification of live E. coli remaining on each layer with and without disinfection treatments. As the bacteria was unable to penetrate through meltblown filter web and inner web, the images of only coverweb and stiffener are presented. (C) FE-SEM images of loaded bacteria after microwaving, oven-dry, UV irradiation, IPA immersion, and water-laundering.