Herpes Blood Test (HSV-1 IgG & IgM Antibodies)

This blood test detects antibodies produced by the immune system in response to Herpes Simplex Virus Type 1 (HSV-1), the virus most commonly associated with cold sores and oral herpes. It is suitable for anyone who wishes to check whether they have been exposed to HSV-1, whether they have experienced symptoms or not, and for those who want clarity before or alongside a discussion with their doctor about sexual health or recurring symptoms.

HSV-1 is extremely common and often produces no symptoms at all. Once a person is infected, the virus remains in the body for life, and antibodies can usually be detected in the blood within a few weeks of exposure. This test looks at two types of antibody: IgG, which indicates past or established infection, and IgM, which can appear earlier in the course of infection. Together they help build a picture of whether and when exposure may have occurred.

Herpes Simplex Virus Type 1 (HSV-1) Antibodies
- HSV-1 IgG antibody: typically indicates past exposure or established infection with HSV-1.
- HSV-1 IgM antibody: can be present during a recent or early infection, though it is interpreted alongside the IgG result and your clinical history.

A simple blood sample is all that is required, collected by a trained phlebotomist at your appointment.

Why it matters
Many people carry HSV-1 without ever knowing it, and understanding your antibody status can help you make informed decisions about your health and that of your partners. If you have recurring sores, unusual symptoms, or simply want peace of mind, this test provides a clear, confidential result that you can discuss with your doctor for appropriate advice and any further management.