As scientific evidence and available information on COVID-19 change, Science Briefs will be systematically archived as historic reference materials. Page ...
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CDC recommends community use of masks, specifically non-valved multi-layer cloth masks, to prevent transmission of SARS-CoV-2. Masks are primarily intended to ...
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Mar 15, 2024 · Use viral tests like PCR or rapid at-home tests to determine if you are sick with COVID-19. Learn how to get tested. Doctor wearing mask and ...
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This science brief provides an overview of how CDC's COVID-19 Community Levels framework was developed, the data sources it uses, and how jurisdictions can use ...
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Feb 11, 2022 · This report describes face mask or respirator effectiveness in helping protect against COVID-19 infection.
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The Science of Masking to Control COVID-19 PDF is no longer being updated. Please go to COVID-19 · Website for more recent information.
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CDC Archive Home. Archived web material for CDC.gov is preserved on the CDC Archive Site. Note that the content on this site is for historical purposes only and ...
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Although there has been much discussion regarding whether masks should be used to prevent viral transmission during the initial period of the COVID-19 pandemic, ...
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