hepatitis B virus DNA

My virus DNA has gone from 1500H in august 04  to 9015H in march 05 and 4094 in july 05. My question is: what is the H. I see in other people's labs copies/ml so what does the H in my labs mean. The normal range is shown as <160. Also does the variation in value means anything. why is the number going up and down?
thank you

[dendel]

I believe the H means High.  I use to work in a lab and that is
what it meant.  dendel