The antibody instant COVID-19 test contains a conjugate pad with SARS-CoV-2 recombinant antigens, an IgG line coated with an anti-human IgM line, an IgM line coated with anti-human IgM, and a control line.. After the sample is placed inside the test cassette, the specimen will migrate by capillary action along with the cassette. A COVID-19 antibody test can’t diagnose a current, active infection, but a viral test does. Ongoing studies will eventually reveal more data on this. The timing and type of antibody test affects accuracy. Antibodies usually start developing within 1 to 3 weeks after infection. If your antibody test result was positive, this means that the test shows that you have COVID-19 antibodies in your blood. A negative test result with the Antibody Assay for SARS-CoV-2-specific antibodies does not rule out a SARS-CoV-2 infection. That diagnosis should be based on a PCR (molecular) test. It does not mean they are currently infected. In general, a positive antibody test is presumed to mean a person has been infected with SARS-CoV-2, the virus that causes COVID-19, at some point in the past. COVID-19 Antibody (IgG) Description The SARS-CoV-2 IgG assay is a qualitative test designed to detect IgG antibodies to the nucleocapsid protein of SARS-CoV-2 in serum and plasma from patients who are suspected of past coronavirus disease (COVID-19) or in serum and plasma of subjects that may have been infected by SARS-CoV-2. An antibody test checks whether you had COVID-19 in the past and now have antibodies against the virus. But there's a lack of evidence on whether having antibodies means you're protected against reinfection with COVID-19. It may also mean that you have some immunity. Instead, the COVID-19 antibody test shows if your body has mounted a response to the SARS-CoV-2 virus. The two types of COVID-19 tests are a virus test and an antibody test. An antibody test may not show if you have a current COVID-19 infection because it can take 1–3 weeks after infection for your body to make antibodies. On the other hand, the PCR molecular test to diagnose COVID-19. What does it mean if I have a negative test result? What does a positive antibody test mean? The level of immunity and how long immunity lasts are not yet known. Whether you test positive or negative for COVID-19 on a viral or an antibody test, you still should take steps to protect yourself and others . A negative test result means that the antibodies to the virus that causes COVID-19 were not found in your sample. Here's what you need to know about Covid-19 antibody tests. The Antibody Assay for SARS-CoV-2 is not a diagnostic test to determine if COVID-19 virus is present. 12-14 Negative results suggest that a person has not been infected with SARS-CoV-2 or has been very recently infected (antibodies have not yet been produced). Low lymphocyte levels and high C-reactive protein levels have been associated with poor COVID-19 outcomes. This result means that you were likely infected with COVID-19 in the past. In most cases, exposure to the COVID-19 virus would have resulted in symptoms of an infection. (Virus tests including the PCR/molecular test and the antigen test.) Covid-19 antibody tests can tell you if you have had a previous infection, but with varying degrees of accuracy. A positive COVID-19 IgG antibody test means that you previously had or have been exposed to the virus that causes COVID-19, and that your immune system developed antibodies in response to it. However, all tests, including the COVID-19 antibody test, can give positive results that are incorrect (i.e., false positive results). However, it is possible for this test to give a negative result that is incorrect (false negative) in some people. 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