Medical Laboratory – COVID-19 SEROLOGICAL TESTS

COVID-19 SEROLOGICAL TESTS – quantitative test for IgG antibodies after illness or vaccination:

IgG antibody determination against SARS-CoV-2 is performed to check the production of immunity antibodies by the body after illness or vaccination, which are responsible for fighting the virus at the time of infection.

IgG antibodies can be detected at least 11 days after the onset of symptoms of the disease or after vaccination. They are considered “late-phase” antibodies of the infection, indicating the development of an immune response that protects the body from reinfection. It is recommended to perform antibody detection tests about 14 days after the onset of symptoms or after vaccination.*

A positive result may indicate a past, inactive infection or vaccination against COVID-19.

Interpretation of the quantitative IgG antibody test result – SARS-CoV-2, unit: AU/mL

Range:

below 10 AU/mL – non-reactive

above 10 AU/mL – reactive

What does the test result mean?

A reactive test result means that the body has previously been in contact with the SARS-CoV-2 virus or has developed an immune response in response to the given vaccination, i.e., it has produced antibodies against the SARS-CoV-2 virus.

A non-reactive test result means that antibodies against the SARS-CoV-2 virus were not found in the collected sample. A non-reactive result can occur in infected individuals or after vaccination if the sample was taken too early, and the body did not have enough time to produce antibodies against SARS-CoV-2.

Serological tests can be performed at any time of the day, and there is no need to fast. Before taking blood, it is recommended not to consume a high-fat meal.

COVID-19 serological tests are carried out in the accredited Medical Laboratory Kardio-Med Silesia in Zabrze, in cooperation with Acellmed in Zabrze.

* COVID-19 Diagnosis Update of Recommendations 25.02.2022. Agency for Health Technology Assessment and Tariff System.



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