There are currently several FDA-approved, gG-based blood tests that can give accurate results for herpes. Like any blood test, these tests cannot determine whether the site of infection is oral or genital. However, since most cases of genital herpes are caused by HSV-2, a positive result for type-2 antibodies most likely indicates genital herpes.

It may be necessary to request on of these tests by name from your healthcare provider. ASHA has created the a quick reference guide to herpes blood tests, including a chart that outlines and compares the accurate, FDA-approved type-specific blood tests available for herpes simplex antibodies. To determine which test might be best for your situation - or to show your doctor which tests are available (since herpes is not routinely included in STD screenings), you can download and print ASHA Herpes Blood Test Guide.