TABLE 1.

Demographic details and clinical time intervals for vaccine failures and controls

Patient no.	Sexa	Age at time of illness (yr)	Ethnicity	Time between illness and study (yr)	Time between vaccination and illness (mo)
1	M	18	Asian, Pakistani	6	3
2	M	12	White, Welsh	5	10
3	F	18	White, English	5	17
4	M	12	White, English	5	11
5	M	18	White, English	4	26
6	M	13	White, English	4	8
7	F	19	White, English	3	38
8	F	19	White, British	3	41
9	F	12	White, English	2	40

^aM, male; F, female.