Efficacy of Portable Air Cleaners and Masking for Reducing Indoor Exposure to Simulated Exhaled SARS-CoV-2 Aerosols

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SARS-CoV-2, the virus that causes COVID-19, can be spread by exposure to droplets and aerosols of respiratory fluids that are released by infected persons when they cough, sing, talk, or exhale. To reduce indoor transmission of SARS-CoV-2 between persons, CDC recommends measures including physical distancing, universal masking (the use of face masks in public places by everyone who is not fully vaccinated), and increased room ventilation.

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MMWR-ER-July-2-2021.pdf

Author(s)

  • William G. Lindsley, PhD, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, CDC
  • Raymond C. Derk, MS, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, CDC
  • Jayme P. Coyle, PhD, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, CDC
  • Stephen B. Martin, Jr., PhD, Respiratory Health Division, National Institute for Occupational Safety and Health, CDC
  • Kenneth R. Mead, PhD, Division of Field Studies and Engineering, National Institute for Occupational Safety and Health, CDC
  • Francoise M. Blachere, MS, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, CDC
  • Donald H. Beezhold, PhD, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, CDC
  • John T. Brooks, PhD, CDC COVID-19 Response Team
  • Theresa Boots, MS, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, CDC
  • John D. Noti, PhD, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, CDC

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