Quest Diagnostics



Quest Diagnostics

Antibody blood test

Antibody Test Illustration

This type of test detects antibodies that show if you have had a prior COVID-19 infection—even if you never experienced symptoms. Detection of antibodies means you may now have some level of immunity to the virus.* Understanding your antibody status helps give you and your doctor or healthcare provider added insight to assist in making an informed decision about returning to work or activity.

Who can get tested: Antibody testing is available only to patients who are not currently experiencing COVID-19 symptoms and have not experienced symptoms within 10 days. Common COVID-19 symptoms include fever, cough, and shortness of breath.

How the test works: If your doctor or healthcare provider has submitted an order for you to get a COVID-19 antibody test or you purchased one through QuestDirect, you can make an appointment at a Quest patient service center. You do not need to fast for this test. A phlebotomist will draw your blood, and the specimen is then sent to Quest laboratories for processing.

Where to get tested: You can make an appointment at a Quest patient service center for an antibody test. However, your doctor or healthcare provider must have submitted an order for your test or you must have purchased one through QuestDirect.


What you need to KNOW about antibody tests

COVID-19 antibody tests have the potential to play a critical role in helping our communities move forward. Discover how this test option can tell us more about the virus and give us the insights we need to help stop its spread.


Getting test results through MyQuest

When you get an antibody test at a Quest patient service center, your test results can be sent to you automatically through the secure MyQuest online portal. This is usually the quickest way to get results.

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*While the role of antibodies in preventing COVID-19 disease has yet to be established, antibody testing for other respiratory illnesses (SARS, flu) provides insight into immunity to future diseases.

Testing statements

The antibody tests (sometimes known as the serology tests or IgG tests) are intended for use as an aid in identifying individuals with an adaptive immune response to SARS-CoV-2, indicating recent or prior infection. Results are for the detection of SARS-CoV-2 antibodies. IgG antibodies to SARS-CoV-2 are generally detectable in blood several days after initial infection, although the duration of time antibodies are present post-infection is not well characterized. At this time, it is unknown for how long antibodies persist following infection and if the presence of antibodies confers protective immunity. Individuals may have detectable virus present for several weeks following seroconversion. Negative results do not preclude acute SARS-CoV-2 infection. If acute infection is suspected, molecular testing for SARS-CoV-2 is necessary. The antibody test should not be used to diagnose acute SARS-CoV-2 infection. False positive results for the antibody test may occur due to cross-reactivity from pre-existing antibodies or other possible causes.

  • The antibody tests and the molecular tests (together “All tests”) have not been FDA cleared or approved;
  • All tests have been authorized by FDA under EUAs for use by authorized laboratories;
  • The antibody tests have been authorized only for the detection of IgG antibodies against SARS-CoV-2, not for any other viruses or pathogens;
  • The molecular tests have been authorized only for the detection of nucleic acid from SARS-CoV-2, not for any other viruses or pathogens; and,
  • All tests are only authorized for the duration of the declaration that circumstances exist justifying the authorization of emergency use of in vitro diagnostics for detection and/or diagnosis of COVID-19 under Section 564(b)(1) of the Act, 21 U.S.C. § 360bbb-3(b)(1), unless the authorization is terminated or revoked sooner.