If you're experiencing a sudden onset of fever, fatigue, and jaundice, this is the definitive test for an active Hepatitis E infection. The HEV-IgM test specifically searches for the "first-responder" (IgM) antibodies, which your immune system only produces during a current or very recent infection. Hepatitis E is often waterborne, and this test is the essential, time-sensitive tool your doctor needs to confirm the exact cause of your hepatitis symptoms. A simple blood draw provides the clear, 'real-time' answer you need to get the correct diagnosis and start on your path to recovery.