![What are surgical masks and respirators, and why are they important in the fight against COVID-19? | PBS NewsHour What are surgical masks and respirators, and why are they important in the fight against COVID-19? | PBS NewsHour](https://d3i6fh83elv35t.cloudfront.net/static/2020/03/2020-03-25T160603Z_76830230_RC24RF9SC5KR_RTRMADP_3_HEALTH-CORONAVIRUS-MASKS-1024x684.jpg)
What are surgical masks and respirators, and why are they important in the fight against COVID-19? | PBS NewsHour
Comparing the fit of N95, KN95, surgical, and cloth face masks and assessing the accuracy of fit checking | PLOS ONE
![Surgical masks more effective if worn with 3D-printed frame, Concordia PhD student finds - Concordia University Surgical masks more effective if worn with 3D-printed frame, Concordia PhD student finds - Concordia University](https://www.concordia.ca/content/shared/en/news/stories/2021/07/26/surgical-masks-more-effective-if-worn-with-3d-printed-frame-concordia-phd-student-finds.social.png/1627317037937.jpg)
Surgical masks more effective if worn with 3D-printed frame, Concordia PhD student finds - Concordia University
![Why Would Hospitals Forbid Physicians and Nurses from Wearing Masks? - Scientific American Blog Network Why Would Hospitals Forbid Physicians and Nurses from Wearing Masks? - Scientific American Blog Network](https://static.scientificamerican.com/blogs/cache/file/8775CDAF-4B8D-4B9C-8592D750C2F2EFA7_source.jpg?w=590&h=800&05368338-0053-42E4-9433CB5EDE2660EC)
Why Would Hospitals Forbid Physicians and Nurses from Wearing Masks? - Scientific American Blog Network
![Amazon.com: BYD CARE Single Use Disposable 3-Ply Mask, ASTM Level 3, Daily protection for men and women for Home, Office, School, Restaurants, Gyms, Outdoor and Indoor, Box of 50 PCs : Industrial Amazon.com: BYD CARE Single Use Disposable 3-Ply Mask, ASTM Level 3, Daily protection for men and women for Home, Office, School, Restaurants, Gyms, Outdoor and Indoor, Box of 50 PCs : Industrial](https://m.media-amazon.com/images/I/71qua17nbzS.jpg)