![Efficacy of Portable Air Cleaners and Masking for Reducing Indoor Exposure to Simulated Exhaled SARS-CoV-2 Aerosols — United States, 2021 | MMWR Efficacy of Portable Air Cleaners and Masking for Reducing Indoor Exposure to Simulated Exhaled SARS-CoV-2 Aerosols — United States, 2021 | MMWR](https://www.cdc.gov/mmwr/volumes/70/wr/figures/mm7027e1-F2.gif)
Efficacy of Portable Air Cleaners and Masking for Reducing Indoor Exposure to Simulated Exhaled SARS-CoV-2 Aerosols — United States, 2021 | MMWR
![We should install air purifiers with HEPA filters in every classroom. It could help with COVID, bushfire smoke and asthma We should install air purifiers with HEPA filters in every classroom. It could help with COVID, bushfire smoke and asthma](https://images.theconversation.com/files/416670/original/file-20210818-23-1jcg1ix.jpg?ixlib=rb-1.1.0&rect=0%2C0%2C5915%2C3922&q=20&auto=format&w=320&fit=clip&dpr=2&usm=12&cs=strip)
We should install air purifiers with HEPA filters in every classroom. It could help with COVID, bushfire smoke and asthma
![CDC on X: "Too cold to open windows? Improve ventilation in your home by upgrading your HVAC filter, running a HEPA purifier, and using kitchen/bathroom exhaust fans. See how these actions can CDC on X: "Too cold to open windows? Improve ventilation in your home by upgrading your HVAC filter, running a HEPA purifier, and using kitchen/bathroom exhaust fans. See how these actions can](https://pbs.twimg.com/media/FHEBZNnXMAEAlw5.jpg)
CDC on X: "Too cold to open windows? Improve ventilation in your home by upgrading your HVAC filter, running a HEPA purifier, and using kitchen/bathroom exhaust fans. See how these actions can
![A Portable System for Healthcare Worker Safety and Patient Isolation during COVID-19 and Other Respiratory Infections - Anesthesia Patient Safety Foundation A Portable System for Healthcare Worker Safety and Patient Isolation during COVID-19 and Other Respiratory Infections - Anesthesia Patient Safety Foundation](https://www.apsf.org/wp-content/uploads/newsletters/online-only/202006/hepa-filter-blower-on-off.jpg)