Fig 2. Detection of HBV-DNA copies in PBMC culture supernatant.

HBV DNA was detected by FQ-PCR in the supernatant of the PBMCs incubated with mixtures of ESP and HBV positive serum or HBV positive serum only, or ESPs only. Medium alone served as a control. Asterisks indicate statistically significant differences between HBV positive sera only and mixtures of HBV positive sera and ESPs, as measured by paired, two-tailed Student's t-test (** p <0.01).