Table 1

Clinical and immunological data of the 13 cases who had repeat serology approximately four years after aciclovir prophylaxis

						Antibody titres to VZV
Case No	Age1-151 (years)	Sex	Dose of aciclovir (mg/kg/day)	Duration of observation period (months)	Re-exposure of varicella during the observation period	At the time of convalescent phase of aciclovir prophylaxis	Four years after aciclovir prophylaxis1-152
1	1	M	80	50	No	16	4
2	9	M	80	46	No	8	8
3	1	F	20	45	No	8	8
4	0.4	M	20	38	No	<4	4
5	3	M	20	35	No	256	4
6	0.6	F	5	33	No	8	8
7	4	F	18	45	No	128	4
81-150	0.5	F	40	45	Yes	<4	8
9	1	M	20	37	Yes	64	8
101-150	1	M	40	38	Yes	<4	16
11	4	M	30	48	Yes	16	16
12	2	F	18	45	Yes	8	16
131-150	0.5	F	40	47	Yes	8	64

↵1-150 These three cases showed an antibody rise during the observation period.
↵1-151 Represents age at the time of aciclovir prophylaxis.
↵1-152 Antibody titres in cases 8 to 13 were significantly higher than those in cases 1 to 7 (p<0.01).