What does it mean if your hhv 6 igg antibodies are high?

Nothing: The level doesn't matter. You are immune to herpes 6 from previous infection. There are rumors that the levels are higher in people with multiple sclerosis than in controls, but this is research-only and not a helpful test or 'one more thing for you to worry about.' some independent thinkers talk of this in relationship to chronic fatigue syndrome; i doubt a strong link here.