Table 1.

GMT and SCR characteristics

Time point after primary immunization	No. of patients	Range of titers (IU/ml)	GMT (IU/ml)	Seroconversion rate (%)
Day 0	195	<0.5		0
Day 7	195	0.2–14.5	0.56	41.2
Day 14	195	1.7–23.7	8.87	100
Day 45	195	2.9–35.0	16.13	100
Yr 1	183	0.3–19.5	1.79	90.5
Yr 2	177	0.2–17.2	1.44	60.5
Yr 3	174	0.1–13.1	1.21	49.1
Yr 4	171	0.0–11.0	0.99	41.5
Yr 5	168	0.0–10.2	0.81	34.0
Yr 5 + day 14	168	1.3–45.2	15.22	100