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Herpes Simplex 1 IgG (HSV-1)

What Is the HSV-1 IgG Test?

The HSV-1 IgG test is a blood test used to detect immunoglobulin G (IgG) antibodies to herpes simplex virus type 1 (HSV-1), a common viral infection known to cause cold sores or fever blisters around the lips and mouth.

How the Test Works

IgG antibodies are produced by the immune system in response to infection and usually become detectable within a few weeks of exposure. Once a person has been infected with HSV-1, their immune system generates IgG antibodies that typically remain in the bloodstream for life.

Detecting Past HSV-1 Infections

The HSV-1 IgG test is primarily used to determine if someone has had a previous infection. While the test confirms exposure to the virus, it does not indicate whether the virus is currently active or causing symptoms.

When HSV-1 IgG Testing Is Recommended

This test may be recommended for:

Individuals with a history of cold sores or oral blisters

People who may have been exposed to HSV-1 through personal or intimate contact

Patients undergoing routine screening for sexually transmitted infections (STIs)

Lifelong Immunity and Monitoring

Following an initial HSV-1 infection, the body typically retains long-term immunity. Although the virus may reactivate in some cases, the presence of IgG antibodies alone does not confirm active infection.

Private HSV-1 Testing in Slough

Residents of Slough and nearby areas such as Langley, Windsor, Maidenhead, and Burnham can access private HSV-1 IgG blood testing services. Early diagnosis and awareness of HSV-1 status support better personal health management and reduce the risk of transmission to others.