The Herpes Simplex Virus (HSV) 2 IgG test is a laboratory test used to detect the presence of IgG antibodies specific to the herpes simplex virus 2 (HSV-2) in a patient’s blood sample. The test works by detecting the body’s immune response to the virus, which is indicated by the presence of IgG antibodies. HSV-2 is a virus that causes genital herpes, and is transmitted through sexual contact with an infected individual. The IgG test is typically used to diagnose past HSV-2 infections, as IgG antibodies can persist in the blood for the lifetime of the individual following infection. The test can also be used to identify individuals who are at risk for HSV-2 infections or to determine whether someone has been exposed to the virus. A positive result from the IgG test indicates that the person has been infected with HSV-2 at some point in their life, but does not necessarily indicate that they have a current infection. Overall, the HSV-2 IgG test is a valuable tool in the diagnosis and management of HSV-2 infections, and can help identify populations at risk for infection and guide prevention strategies.