The introduction of a mandatory mask policy was associated with significantly reduced COVID-19 cases in a major metropolitan city | PLOS ONE
Mask wearing in community settings reduces SARS-CoV-2 transmission | PNAS
Now Is the Time to Upgrade Your Mask
Expiratory aerosol particle escape from surgical masks due to imperfect sealing | Scientific Reports
Mask-wearing and control of SARS-CoV-2 transmission in the USA: a cross-sectional study - The Lancet Digital Health
Homemade Face Masks Work; Effectiveness Varies Depending on How They Are Made - AIP Publishing LLC
Get the Most Out of Masking
Will one-way masking protect you from COVID in public spaces? : Goats and Soda : NPR
Why are Britons reluctant to wear masks to contain covid-19? | The Economist
Mask Recommendations | Pitkin County COVID-19 Response & Recovery
EPA Researchers Test Effectiveness of Face Masks, Disinfection Methods Against COVID-19 | US EPA
Filtration Performance of Layering Masks and Face Coverings and the Reusability of Cotton Masks after Repeated Washing and Drying - Aerosol and Air Quality Research
What is the efficacy of standard face masks compared to respirator masks in preventing COVID-type respiratory illnesses in primary care staff? - The Centre for Evidence-Based Medicine
Wearing a mask is not only important, it's life-saving. | Lincoln, NE | Bryan Health
Now Is the Time to Upgrade Your Mask
Effectiveness of Face Masks in Preventing Airborne Transmission of SARS-CoV-2 | mSphere
Efficacy of masks and face coverings in controlling outward aerosol particle emission from expiratory activities | Scientific Reports
![Optical microscopic study of surface morphology and filtering efficiency of face masks [PeerJ]](https://dfzljdn9uc3pi.cloudfront.net/2019/7142/1/fig-1-full.png "Optical microscopic study of surface morphology and filtering efficiency of face masks [PeerJ]")
Optical microscopic study of surface morphology and filtering efficiency of face masks [PeerJ]
Effectiveness of Face Mask or Respirator Use in Indoor Public Settings for Prevention of SARS-CoV-2 Infection — California, February–December 2021 | MMWR
Improving Mask Effectiveness Through Double–masking | Medanta
Face Mask Effectiveness - Henry J. Austin Health Center
.png?sfvrsn=426c7e4a_0 "Explainer: Testing the Efficacy of Protective Face Masks")
Explainer: Testing the Efficacy of Protective Face Masks
Face masks: What makes some better than others against COVID-19
EPA Researchers Test Effectiveness of Face Masks, Disinfection Methods Against COVID-19 | US EPA
A cluster randomised trial of cloth masks compared with medical masks in healthcare workers | BMJ Open
Infographic: Using face masks in the community
How mask antiviral coatings may limit COVID-19 transmission
