The above picture shows how hiv virus multiplies over a period of time in the absence of hiv treatment.
As you can see the number of viral copies are more on the extreme rightside of the picture clearly indicates late stage of the disease .
As the viral copies are more the cd4 count would be less .CD4 counts less than 50 indicates AIDS STAGE which has bad prognosis.
In the early stages the viral copies are less (left side of the picture) and so these patients have higer cd4 counts and most often donot have any symtoms.