77% of humans are exposed to HHV-6B by the age of two and the prevalence of HHV-6 in adults is assumed to be over 90%. After the primary infection, the HHV-6 DNA appears briefly in the serum (and spinal fluid) and then a small amount of virus establishes latency. Small amounts of DNA can be found in the white blood … Continue reading Epidemiology of HHV-6