SARS-CoV-2 Immunoglobulin A (IgA) Antibody, Serum/Plasma

What Does This Test Measure?

IgA antibodies are a type of antibody produced by your immune system in response to the SARS-CoV-2 virus. These antibodies can appear in your blood after you’ve been exposed to the virus, either through infection or vaccination. The test detects these antibodies using an immunoassay method to confirm their presence in your serum or plasma.

Why Might You Need This Test?

Healthcare providers may order this test if you’ve had symptoms of COVID-19, received a recent vaccination, or are being evaluated for past infection—especially if other tests (like PCR or antigen tests) were inconclusive. It can also help monitor immune response in certain clinical settings.

How Is the Test Performed?

A blood sample is drawn from a vein in your arm. The sample is then processed to separate serum or plasma, which is tested for IgA antibodies using a specialized immunoassay technique. Results are typically available within 24 to 48 hours.

What Are the Possible Results?

Results are qualitative (positive or negative) and indicate whether IgA antibodies are detected in your sample. A positive result suggests exposure to the virus or an immune response, but it does not confirm active infection. Interpretation depends on clinical context and other test results.