Table 2

Distribution of cases of serogroup C meningococcal disease according to the period of follow up and the vaccination status

Age at the time of vaccination		Period of follow up
		6 months				12 months			18 months		24 months
		Vaccinated	Unvaccinated			Vaccinated	Unvaccinated		Vaccinated	Unvaccinated	Vaccinated	Unvaccinated
18 months–4 years	1	1		1	1		2	4	2	7
5–9 years	0	0		0	0		0	2	0	2
10–14 years	0	0		0	2		0	3	0	3
15–19 years	0	5		0	8		0	8	0	10
Total	1	6		1	11		2	17	2	22