On March 22, the CDC updated its guidance for respiratory viruses. The agency reiterated that ventilation can reduce exposure to respiratory viruses in indoor spaces.
The guidance states, “Improving ventilation, whether natural or mechanical (air flow, filtration, and air treatment), reduces the number of small respiratory virus particles in indoor air, helping lower the risk of transmission. Ventilation is one of many tools available to help protect people from respiratory viruses.”
Further, “CDC is providing actionable steps that people can take to reduce the number of small respiratory virus particles that circulate in indoor air. On March 1, 2024, CDC released updated guidance for respiratory viruses, which recommended taking steps for cleaner air, along with staying up to date on vaccines for respiratory illnesses such as COVID-19 and flu, as core prevention strategies to lower risk. Some of these recommended actions to improve ventilation may require systems-level changes, but individuals can still take steps to reduce exposure to virus particles in buildings, especially in their homes.”
CDC has the full guidance.
