Serology testing, also known as antibody testing, uses an immunoassay to check a blood sample for signs of previous exposure to the virus, such as whether the patient’s immune system produced SARS-CoV-2-specific antibodies after COVID-19 infection. 

*Antibody testing may be right for you if you:

  • Have had a positive test for COVID-19 and it has been at least 3 days and you want to know if you have detectable levels of IgM and/or IgG antibodies
  • Have not experienced a fever or felt feverish in the last 3 days
  • Have not experienced new or worsening symptoms of COVID-19 in the past 10 days: loss of smell or taste, shortness of breath or difficulty breathing, feeling weak or lethargic, lightheadedness or dizziness, vomiting or diarrhea, slurred speech, and/or seizures

 (*Source: CDC)

A positive result means you may have antibodies from being infected with the novel coronavirus SARS-CoV-2, which causes COVID-19. You can get positive results even if you never had symptoms. This is called asymptomatic infection. A second type of antibody test may be needed to determine if the first one was accurate. Note that antibodies generated against other viruses from the coronavirus family can also be detected with this test. 

Having antibodies may provide protection from getting the virus again, but scientists do not yet know how much protection is provided and how long this may last. Take steps to protect yourself and those around you because you may still be able to spread the virus.

This test cannot tell you if you have an active infection. If you suspect you have COVID-19, follow up with your personal healthcare provider about getting a COVID-19 PCR (swab) test. For more information, visit CDC website


COVID-19 Antibody Test