Table 3.

Anamnestic anti-HBs response after challenge vaccination with either Sci-B-Vac (A) or Engerix-B (B). Anti-HBs titers before challenge are shown in the first column, while that after challenge in the first row. The number and the percentage (in brackets) of children presented with each anti-HBs category after challenge are indicated. All children were vaccinated with 3 doses of Engerix-B in early childhood

A
After Before	0-<10 (mIU/ml)	10-<100 (mIU/ml)	100-<1000 (mIU/ml)	≥1000 (mIU/ml)	total number
0-<10 mIU/ml	0	6 (12.3%)	32 (65.3%)	11 (22.4%)	49
10-<100 mIU/ml	0	1 (3.0%)	16 (47.0%)	17 (50.0%)	34
B
After Before	0-<10 (mIU/ml)	10-<100 (mIU/ml)	100-<1000 (mIU/ml)	>1000 (mIU/ml)	total number
0-<10 mIU/ml	1 (3.7%)	5 (18.5%)	11 (40.8%)	10 (37.0%)	27
10-<100 mIU/ml	0	2 (6%)	9 (27.3%)	22 (66.7%)	33