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Table 2 Average annual rates (per 100,000 individuals) of meningococcal disease in the US (1997–2001)

From: Invasive meningococcal disease epidemiology and control measures: a framework for evaluation

Age (years)

Group B

Group C

Group Y

Other

All Groups

<1

5.1

1.0

2.3

1.1

9.6

1

1.4

0.8

0.7

0.5

3.4

2–4

1.1

0.7

0.2

0.3

2.3

5–17

0.3

0.4

0.3

0.2

1.1

18–34

0.3

0.2

0.2

0.1

0.8

35–49

0.1

0.1

0.1

0.1

0.4

50–64

0.1

0.1

0.2

0.1

0.5

≥65

0.2

0.2

0.6

0.2

1.2

All Ages

0.3

0.2

0.3

0.1

1.0