Herpes Simplex Virus (HSV) IgM antibodies are immune proteins that may appear as part of the body’s response to herpes simplex virus, including HSV-1 and/or HSV-2. IgM is sometimes associated with a recent immune response, but it can be difficult to interpret and may also appear during recurrent infections. A positive result does not confirm an active infection and does not distinguish between HSV-1 and HSV-2.
