Fig. 5

IL2 responses to HBsAg in HC correlate with hepatitis B vaccination status. (a) Receiver-operating-characteristic (ROC) curve. AUC, area under the curve. (b) Scatter plot of IL2 release of HepB vaccinated and not vaccinated HC after HBsAg stimulation of whole blood. Negative control values were deducted from the antigen induced responses. Dotted line indicates IL2 cut-off at 11 pg/ml. n = 74 HC, whereas n = 33 were anti-HBs positive and n = 41 anti-HBs negative