COVID-19 Serology Surveillance

CDC is working with state, local, territorial, academic, and commercial partners to better understand COVID-19 in the United States. Serology tests look for antibodies in blood. If antibodies are found, that means there has been a previous infection. Antibodies are proteins that can fight off infections.
About CDC Serology Surveillance

• About Serology Testing
• Serology Surveillance Strategy
• CDC Seroprevalence Survey Types

Serology Surveillance Surveys

• Large-scale Geographic Seroprevalence Surveys
• Community-level Seroprevalence Surveys
• Special Populations Seroprevalence Surveys

Guidance on Serology (or Antibody) Testing
About Using COVID-19 Antibody Test

• Antibody Testing At-A-Glance
• Antibody Testing Interim Guidelines
• Information on CDC Serology Testing Lab Work
• FAQs for Laboratorians on Serology

More Information

• Testing for COVID-19
• Test for Past Infection
• Assessing Risk Factors
• FAQ Data & Surveillance
• FAQs on Testing