HSV 2 lab results

I understand the ranges for negative lab results for HSV 2 (<0.9 = negative), but what I don't understand is how come your blood can be 0.3 with negative results?  Wouldn't this mean there are some of these antibodies in my blood?  Does it mean I have been exposed to HSV 2 and not contracted it?  Could it mean that I have been infected with a similiar virus such as shingles and that's why lab values are set at ,0.9 and not 0.0?

[gracefromHHP]

IT's from the way they do the test. You won't get a 0.  http://www.medhelp.org/posts/show/776165  is a terrific post wher eTerri Warren explained  it better.

grace