Effectiveness of Face Mask or Respirator Use in Indoor Public Settings for Prevention of SARS-CoV-2 Infection — California, February–December 2021

Details

• Personal Author:
  Andrejko,Kristin L. ; Pry, Jake M. ; Myers, Jennifer F. ; Fukui, Nozomi ; DeGuzman, Jennifer L. ; Openshaw, John ; Watt, James P. ; Lewnard, Joseph A. ; Jain, Seema
• Corporate Authors:
  California COVID-19 Case-Control Study Team. ; University of California, Berkeley. School of Public Health. Division of Epidemiology and Biostatistics. ; California. Department of Public Health. ; University of California, Berkeley. School of Public Health. Division of Infectious Diseases & Vaccinology. ; University of California, Berkeley. College of Engineering. Center for Computational Biology.
• Description:
  What is already known about this topic? Face masks or respirators (N95/KN95s) effectively filter virus-sized particles in laboratory settings. The real-world effectiveness of face coverings to prevent acquisition of SARS-CoV-2 infection has not been widely studied. ; What is added by this report? Consistent use of a face mask or respirator in indoor public settings was associated with lower odds of a positive SARS-CoV-2 test result (adjusted odds ratio = 0.44). Use of respirators with higher filtration capacity was associated with the most protection, compared with no mask use. ; What are the implications for public health practice? In addition to being up to date with recommended COVID-19 vaccinations, consistently wearing a comfortable, well-fitting face mask or respirator in indoor public settings protects against acquisition of SARS-CoV-2 infection; a respirator offers the best protection. ; Suggested citation for this article: Andrejko KL, Pry JM, Myers JF, et al. Effectiveness of Face Mask or Respirator Use in Indoor Public Settings for Prevention of SARS-CoV-2 Infection — California, February–December 2021. MMWR Morb Mortal Wkly Rep. ePub: 4 February 2022. ; mm7106e1.htm?s_cid=mm7106e1_w ; mm7106e1-H.pdf
• Subjects:
  • COVID-19/prevention & control
  • Coronavirus Infections/prevention & control
  • Disease Transmission, Infectious/prevention & control
  • Masks / standards
• Source:
  MMWR: Morbidity and Mortality Weekly Report 2022; v. 71 Early Release
• Series:
  Weekly Report: Morbidity and Mortality Weekly Report (MMWR)
• ISSN:
  0149-2195 (print) ; 1545-861X (digital)
• Document Type:
  Journal Article
• Place as Subject:
  California
• Pages in Document:
  6 pdf pages
• Volume:
  71
• Download URL:
  https://stacks.cdc.gov/view/cdc/114183/cdc_114183_DS1.pdf
• File Type:
  [PDF - 228.76 KB]
• Collection(s):
  Morbidity and Mortality Weekly Report (MMWR)
• Main Document Checksum:
  urn:sha-512:b37e819d2dbf2950ecc4c6a4b8039f80181fb7bfd9b9f60f5dd4fafa06896bfd4f34a76c4bd286cd58e51acdf3e82200d4af70d141e2cf490683c1fb29fce3f6