Fig. 2From: Immune persistence 17 to 20 years after primary vaccination with recombination hepatitis B vaccine (CHO) and the effect of booster dose vaccinationReverse cumulative distribution curves for individual post-booster anti-HBV concentrations in pre-booster anti-HBs concentrations < 2.5 mIU/ml and ≥ 2.5 mIU/mlBack to article page