![One year of surgical mask testing at the University of Bologna labs: Lessons learned from data analysis - ScienceDirect One year of surgical mask testing at the University of Bologna labs: Lessons learned from data analysis - ScienceDirect](https://ars.els-cdn.com/content/image/1-s2.0-S1383586622007377-gr6.jpg)
One year of surgical mask testing at the University of Bologna labs: Lessons learned from data analysis - ScienceDirect
![One year of surgical mask testing at the University of Bologna labs: Lessons learned from data analysis - ScienceDirect One year of surgical mask testing at the University of Bologna labs: Lessons learned from data analysis - ScienceDirect](https://ars.els-cdn.com/content/image/1-s2.0-S1383586622007377-gr7.jpg)
One year of surgical mask testing at the University of Bologna labs: Lessons learned from data analysis - ScienceDirect
![One year of surgical mask testing at the University of Bologna labs: Lessons learned from data analysis - ScienceDirect One year of surgical mask testing at the University of Bologna labs: Lessons learned from data analysis - ScienceDirect](https://ars.els-cdn.com/content/image/1-s2.0-S1383586622007377-gr10.jpg)
One year of surgical mask testing at the University of Bologna labs: Lessons learned from data analysis - ScienceDirect
![One year of surgical mask testing at the University of Bologna labs: Lessons learned from data analysis - ScienceDirect One year of surgical mask testing at the University of Bologna labs: Lessons learned from data analysis - ScienceDirect](https://ars.els-cdn.com/content/image/1-s2.0-S1383586622007377-gr4.jpg)
One year of surgical mask testing at the University of Bologna labs: Lessons learned from data analysis - ScienceDirect
![Amazon.com: Crosstex International GCPLV Earloop Mask Procedural Lavender 50/Bx : Industrial & Scientific Amazon.com: Crosstex International GCPLV Earloop Mask Procedural Lavender 50/Bx : Industrial & Scientific](https://m.media-amazon.com/images/I/81qU+0jspQL.jpg)
Amazon.com: Crosstex International GCPLV Earloop Mask Procedural Lavender 50/Bx : Industrial & Scientific
![Amazon.com: Crosstex International GCPLV Earloop Mask Procedural Lavender 50/Bx : Industrial & Scientific Amazon.com: Crosstex International GCPLV Earloop Mask Procedural Lavender 50/Bx : Industrial & Scientific](https://m.media-amazon.com/images/I/81hxWgVtgjL._AC_UF350,350_QL80_.jpg)
Amazon.com: Crosstex International GCPLV Earloop Mask Procedural Lavender 50/Bx : Industrial & Scientific
![Amazon.com: Pack of 50 Disposable Face Mask 3-Ply Breathable & Comfortable Safety Mask, Protective Masks for Indoor and Outdoor - Individually Wrapped (Black Mask) : Industrial & Scientific Amazon.com: Pack of 50 Disposable Face Mask 3-Ply Breathable & Comfortable Safety Mask, Protective Masks for Indoor and Outdoor - Individually Wrapped (Black Mask) : Industrial & Scientific](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/81ZocHqJTLL.jpg)
Amazon.com: Pack of 50 Disposable Face Mask 3-Ply Breathable & Comfortable Safety Mask, Protective Masks for Indoor and Outdoor - Individually Wrapped (Black Mask) : Industrial & Scientific
![Amazon.com: Crosstex International GCPLV Earloop Mask Procedural Lavender 50/Bx : Industrial & Scientific Amazon.com: Crosstex International GCPLV Earloop Mask Procedural Lavender 50/Bx : Industrial & Scientific](https://m.media-amazon.com/images/I/81RdjqdHd6L._AC_UF1000,1000_QL80_.jpg)
Amazon.com: Crosstex International GCPLV Earloop Mask Procedural Lavender 50/Bx : Industrial & Scientific
![NinoMed ASTM Level 3 Masks, MADE IN USA, Blue, 50 Pack, Breathable Material, Comfortable Fit, Latex Free: Amazon.com: Tools & Home Improvement NinoMed ASTM Level 3 Masks, MADE IN USA, Blue, 50 Pack, Breathable Material, Comfortable Fit, Latex Free: Amazon.com: Tools & Home Improvement](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/617i8xXP7jL._AC_UY1000_.jpg)
NinoMed ASTM Level 3 Masks, MADE IN USA, Blue, 50 Pack, Breathable Material, Comfortable Fit, Latex Free: Amazon.com: Tools & Home Improvement
![NinoMed ASTM Level 3 Masks, MADE IN USA, Blue, 50 Pack, Breathable Material, Comfortable Fit, Latex Free: Amazon.com: Tools & Home Improvement NinoMed ASTM Level 3 Masks, MADE IN USA, Blue, 50 Pack, Breathable Material, Comfortable Fit, Latex Free: Amazon.com: Tools & Home Improvement](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/716qccEb2mL._AC_UY1000_.jpg)