![Effectiveness of Face Mask or Respirator Use in Indoor Public Settings for Prevention of SARS-CoV-2 Infection — California, February–December 2021 | MMWR Effectiveness of Face Mask or Respirator Use in Indoor Public Settings for Prevention of SARS-CoV-2 Infection — California, February–December 2021 | MMWR](https://www.cdc.gov/mmwr/volumes/71/wr/social-media/mm7106e1_MaskingEffectiveness_IMAGE_04Feb22_1200x675_1.jpg?_=64903)
Effectiveness of Face Mask or Respirator Use in Indoor Public Settings for Prevention of SARS-CoV-2 Infection — California, February–December 2021 | MMWR
![CDC Recommended Premium Reusable Face Masks in Black DTY Brush: Soft, Durable, and Breathable, One-size fits most men and women, Sold in packs of 5 | Singer Equipment Co. CDC Recommended Premium Reusable Face Masks in Black DTY Brush: Soft, Durable, and Breathable, One-size fits most men and women, Sold in packs of 5 | Singer Equipment Co.](https://assetcloud.roccommerce.net/w458-h458-cpad//_singer/7/7/6/how-to-wear-face-masks.jpg)
CDC Recommended Premium Reusable Face Masks in Black DTY Brush: Soft, Durable, and Breathable, One-size fits most men and women, Sold in packs of 5 | Singer Equipment Co.
![New CDC mask guidance: Vaccinated people don't need face coverings in most outdoor settings – Orange County Register New CDC mask guidance: Vaccinated people don't need face coverings in most outdoor settings – Orange County Register](https://www.mercurynews.com/wp-content/uploads/2021/04/CDC-mask-guideline-042821-01-1.jpg)
New CDC mask guidance: Vaccinated people don't need face coverings in most outdoor settings – Orange County Register
![Trends in County-Level COVID-19 Incidence in Counties With and Without a Mask Mandate — Kansas, June 1–August 23, 2020 | MMWR Trends in County-Level COVID-19 Incidence in Counties With and Without a Mask Mandate — Kansas, June 1–August 23, 2020 | MMWR](https://www.cdc.gov/mmwr/volumes/69/wr/social-media/mm6947e2_KSMaskMandateCOVID19_IMAGE_20Nov20_1200x675.jpg)
Trends in County-Level COVID-19 Incidence in Counties With and Without a Mask Mandate — Kansas, June 1–August 23, 2020 | MMWR
![WVU partners with the CDC to conduct mask observation study, reports encouraging baseline results | WVU Today | West Virginia University WVU partners with the CDC to conduct mask observation study, reports encouraging baseline results | WVU Today | West Virginia University](https://wvutoday.wvu.edu/files/d/376e4952-e083-4e8e-8da9-edcb725e499c/wear-a-mask-graphic-feature.jpg)
WVU partners with the CDC to conduct mask observation study, reports encouraging baseline results | WVU Today | West Virginia University
![CDC on Twitter: "Masks + vaccines + boosters = best protection against #Omicron. When you wear a mask, you help protect yourself & others from #COVID19. Choose a mask with the best CDC on Twitter: "Masks + vaccines + boosters = best protection against #Omicron. When you wear a mask, you help protect yourself & others from #COVID19. Choose a mask with the best](https://pbs.twimg.com/media/FJGUWh1XEAMleJm.jpg:large)