Description
Why It’s Done:
• To detect a recent or acute infection with Influenza B virus.
• To help diagnose influenza-like illness, especially when other tests (like rapid antigen or PCR) are not available.
• May be used in epidemiological studies or to monitor outbreaks.
• To differentiate between new and past infections, especially when paired with the Influenza B – IgG test.
Note: IgM levels usually rise within a few days of infection and decline after a few weeks.
Preparation:
• No fasting or special preparation is needed.
• A simple blood sample is collected from a vein, typically in the arm.
• Inform your healthcare provider about any current medications, vaccination history, or immune conditions, as these may influence results.
