question: Hello doctor, I had a test on day-42 (exact six weeks) post a possible exposure. The result shows HSV 1 and 2 IgM antibody (Serum, EIA). Result: Negative (0.64). Associated tests were HSV 1 and 2,  western blot IgM and IgG. What exactly is this test looking for? Only IgM, or both IgM as well as IgG? Is this an IgM ELISA test or a western blot test? Is this test conclusive at day-42 (6 weeks)? Do I need to retest again after 12 to 16 weeks? Kindly answer all the questions in detail.