Table 3. Incidence rates (/100,000) of invasive meningococcal disease caused by isolates of particular serogroups and serogroup distribution in age groups in Poland, 2002–2006 and 2007–2011.

	Incidence per100,000/serogroup distribution in age group, %
	2002–2006					2007–2011
Age	B	C	W-135	Y	UNKa	B	C	W-135	Y	UNKa
in months
0–11 m	4.30/74.8	1.12/19.4	0.11/1.9	0/0	0.22/3.9	9.72/65.3	3.17/21.3	0.10/0.7	0.10/0.7	1.78/12.0
12–23 m	1.91/63.0	0.90/29.6	0/0.0	0.06/1.9	0.17/5.6	4.99/64.5	1.84/23.9	0.05/0.6	0/0	0.85/11.0
24–35 m	0.84/48.4	0.72/41.9	0.06/3.2	0/0	0.11/6.5	2.18/48.9	1.78/39.8	0.10/2.3	0/0	0.41/9.1
36–47	0.49/52.9	0.33/35.3	0/0	0.05/5.9	0.05/5.9	1.83/43.2	1.83/43.2	0/0	0.05/1.2	0.52/12.3
48–59 m	0.38/46.7	0.43/53.3	0/0	0/0	0/0	1.30/52.2	0.71/28.3	0/0	0/0	0.49/19.6
in years
0–4	1.57/64.5	0.70/28.6	0.03/1.4	0.02/0.9	0.11/4.5	4.09/59.4	1.89/27.5	0.05/0.7	0.03/0.4	0.82/11.9
5–9	0.20/53.8	0.16/41.0	0/0	0/0	0.02/5.1	0.46/38.9	0.47/39.8	0/0	0/0	0.25/21.3
10–14	0.08/28.6	0.20/71.4	0/0	0/0	0/0	0.23/27.0	0.48/55.1	0.01/1.1	0.02/2.2	0.13/14.6
15–19	0.13/30.8	0.24/55.4	0/0	0.01/1.5	0.05/12.3	0.48/30.2	0.84/53.3	0.02/1.5	0.04/2.5	0.20/12.6
20–24	0.07/40.7	0.09/55.6	0/0	0/0	0.01/3.7	0.29/39.8	0.22/29.6	0.03/4.6	0.02/2.8	0.17/23.1
25–44	0.03/53.8	0.02/46.2	0/0	0.0	0/0	0.08/34.6	0.11/48.1	0.00/0.8	0/0	0.04/16.5
45–64	0.03/58.3	0.01/25.0	0/0	0.00/4.2	0.01/12.5	0.11/51.4	0.07/30.6	0.00/1.8	0.01/4.5	0.02/11.7
65+	0.02/55.6	0.02/44.4	0/0	0/0	0/0	0.09/57.5	0.05/30.0	0.00/2.5	0.01/5.0	0.01/5.0
All ages	0.12/53.3	0.09/39.8	0.00/0.7	0.00/0.9	0.01/5.4	0.36/47.5	0.27/35.9	0.01/1.2	0.01/1.4	0.11/13.9

^aUNK – cases with unknown serogroup.