Quantitation of human herpesvirus-6A, -6B and -7 DNAs in whole blood, mononuclear and polymorphonuclear cell fractions from healthy blood donors

These results allow to propose viral load in WB as a sensitive and suitable marker, with values for healthy subjects at approximately 100 Cop/M for both viruses. The prevalence of chromosomally integrated HHV-6 was 0.5%.