08/03/2026
Something a lot of people don't know: herpes tests have a window period, and testing too soon can give you a result that doesn't tell the full story.
Herpes blood tests look for IgG antibodies — the proteins your immune system makes after exposure. But those antibodies take time to build up. The CDC recommends waiting at least 12 to 16 weeks after a potential exposure before testing, because testing earlier may not yet detect an infection that is actually there.
This isn't a flaw in the test. It's just how the immune system works. Testing at the right time means your result is far more likely to reflect your actual status.
If you're unsure when to test or what your result means, a licensed physician can help you make sense of it. We make it easy to order a herpes IgG blood test on your own schedule — fast, private, secure — so you have the information you need when the time is right.