Fluorescent Immunoassay for Anti-Flu Virus Nucleoprotein Antibodies (Qualitative)

This section explains exactly what the test measures, including the specific substances, cells, or markers in your body that are being evaluated and what the results may reveal about your overall health.

The test measures the presence of antibodies specific to the flu virus’s nucleoprotein—a protein found inside the virus. These antibodies indicate your immune system has recognized and responded to the flu virus, typically after infection.

A trained healthcare professional will collect your sample, most often by drawing a small amount of blood from a vein in your arm using a sterile needle, following standard safety procedures to keep you comfortable.

A blood sample is drawn from a vein in your arm. The blood is processed to separate the serum (liquid part of blood without clots) for testing.

Your healthcare provider may order this test to help diagnose a medical condition, monitor an ongoing illness, check how well a treatment is working, or screen for potential health problems before symptoms develop.

Your healthcare provider may order this test if you’ve had symptoms of the flu, have been exposed to someone with the flu, or if you’re unsure whether you’ve had the flu in the past. It can also help monitor immune response after vaccination.

This test is commonly used to assess your general health, support the diagnosis of specific conditions, guide treatment decisions, and track changes in your results over time so your care team can manage your health effectively.

This test is often used to confirm past flu infection, especially in cases where symptoms were mild or unclear. It can also help assess immune response in people who’ve received flu vaccines or have had recent flu exposure.