MMWR Early Release: Morbidity and Mortality Weekly Report, February 4, 2022: Effectiveness of Face Mask or Respirator Use in Indoor Public Settings for Prevention of SARS-CoV-2 Infection -- California, February-December 2021   [open pdf - 229KB]

The Morbidity and Mortality Weekly Report (MMWR) Series is prepared by the Centers for Disease Control and Prevention (CDC). [It] is the agency's primary vehicle for scientific publication of timely, reliable, authoritative, accurate, objective, and useful public health information and recommendations. This early release issue of MMWR contains the following article: "Effectiveness of Face Mask or Respirator Use in Indoor Public Settings for Prevention of SARS-CoV-2 [severe acute respiratory syndrome coronavirus 2] Infection -- California, February-December 2021." Notifiable Diseases and Mortality Tables from this issue can be accessed at the following link [http://www.cdc.gov/mmwr/index2022.html].