![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
![Amazon.com: FaceTory - Handpicked Korean Sheet Masks Subscription Box: 4-Ever Fresh : Beauty & Personal Care Amazon.com: FaceTory - Handpicked Korean Sheet Masks Subscription Box: 4-Ever Fresh : Beauty & Personal Care](https://m.media-amazon.com/images/I/71IKpvcdNGL._AC_UF350,350_QL80_.jpg)
Amazon.com: FaceTory - Handpicked Korean Sheet Masks Subscription Box: 4-Ever Fresh : Beauty & Personal Care
![Still Confused About Masks? Here's the Science Behind How Face Masks Prevent Coronavirus | UC San Francisco Still Confused About Masks? Here's the Science Behind How Face Masks Prevent Coronavirus | UC San Francisco](https://www.ucsf.edu/sites/default/files/2020-06/Woman-mask-grocery-store.jpg)