COVID-19 Serum Antibody IgG (Blood Test) Information

There are two types of tests available for COVID-19 screening: antibody and diagnostic.

  Serum Antibody IgG (Blood Test): Check your blood for antibodies that would show if you have had a previous infection. Antibodies are proteins that help fight off germs. A serologic test may not be able to show if you have a current infection, because it can take 1 to 3 weeks to make antibodies after symptoms occur. We do not know if having antibodies to SARS-CoV-2 can protect someone from getting infected with that virus again, or how long protection might last. Scientists are doing studies to answer those questions. If you test positive or negative for COVID-19, no matter the type of test, you still need to take preventive measures to protect yourself and others.

  How Accurate is Marque’s Antibody Tests?

Our tests are from a reputable company called Biohit. They have submitted their application to the FDA and HAVE an EUA filing (Emergency Use Authorization). This means that the product has passed the FDA evidence of effectiveness test and is accurate. FDA approval takes a long time and the virus has only been with us since the beginning of the year. That is why there are very few FDA approved antibody tests as of now and they are issuing EUAs to allow products to be distributed if it meets their guidelines. The sensitivity of our rapid IgM and IgG antibody test is 97.5%, and the specificity is 99.5% in clinical studies. We have been running the rapid tests in parallel with our lab tests and we are reporting the same level of accuracy. To read more about the Biohit SARS-CoV-2 Antibody Test Kit and the Yale study, please click here.

  Do You Offer Rapid Antibody Testing?

Yes. We offer antibody testing at all Marque facilities. You do not need an appointment or referral from a provider. We do not bill insurance for antibody testing. We offer our patients TWO options, rapid or lab-sent antibody tests. The Biohit rapid test is $100. If you prefer the lab option because you would like to see more information beside positive or negative results, then you can get a blood draw sent to WestPacific Labs for $120. If you want to do both the lab sent and rapid at the same time, the cost is $170.

Questions? Please visit our COVID-19 Frequently Asked Questions page

We’re also offering COVID-19 PCR Diagnostic Testing. For More Information visit our COVID-19 Diagnostic Testing Information page.