Table 2.

Distribution of vaccination by age group of the symptomatic cases

Age group	Cases with indicated number of vaccine doses (%)
	0	1	2	3	⩾4	Total
<2 m	87 (97)	1 (1)	0 (0)	0 (0)	0 (0)	88
2–18 m	94 (55)	62 (36)	10 (6)	3 (2)	1 (0.5)	170
19 m–4 y	1 (100)	0 (0)	0 (0)	0 (0)	0 (0)	1
5–15 y	1 (100)	0 (0)	0 (0)	0 (0)	0 (0)	1
Total n (%)	183 (69)*	63 (24)	10 (4)	3 (1.1)	1 (0.3)	260

m, months; y, years; ND, no data available.

*P < 0.05 between vaccinated (n = 77) and unvaccinated (n = 183) patients.