Information for Laboratories about Coronavirus (COVID-19)
Information for Laboratories about Coronavirus (COVID-19)
Using Antigen Tests
Guidance on effective clinical and public health use of antigen tests for COVID-19 in different testing situations
Archived Content
Search for and find historical COVID-19 pages and files. Please note the content on these pages and files is no longer being updated and may be out of date.
- Visit archive.cdc.gov for a historical snapshot of the COVID-19 website, capturing the end of the Federal Public Health Emergency on June 28, 2023.
- Visit the dynamic COVID-19 collection to search the COVID-19 website as far back as July 30, 2021.