Persistence of hepatitis B vaccine immune protection and response to hepatitis B booster immunization

Table 3 Distribution of anti-HBs levels one and twelve months after booster among immunized children with different anti-HBs levels before booster

Anti-HBs (mIU/ml) before booster	Anti-HBs levels (mIU/mL) one month after booster									Anti-HBs levels (mIU/mL) 12 months after booster
	No.	< 10		≥ 10		≥ 100		≥ 1000		No.	< 10		≥ 10		≥ 100		≥ 1000
		n	%	n	%	n	%	n	%		n	%	n	%	n	%	n	%
< 10	65	15	23.1	10	15.4	35	53.9	5	7.7	47	22	46.8	14	29.8	9	19.1	2	4.3
≥ 10	58	0	0.0	5	8.6	49	84.5	4	6.9	45	4	8.9	24	53.4	15	33.3	2	4.4
≥ 100	20	0	0.0	1	5.0	15	75.0	4	20.0	13	0	0.0	5	38.5	8	61.5	0	0.0
≥ 1000	1	0	0.0	0	0.0	1	100.0	0	0.0	0	0	0.0	0	0.0	1	100.0	0	0.0