The changing epidemiology of meningococcal disease in North America 1945–2010

Figures & data

Figure 1. The recent decline in incidence of IMD in the USA and Canada.^{13,14,16,18,22,29} Footnote: The introduction of routine vaccination programs are indicated by the dashed vertical lines; however, some provinces in Canada introduced routine vaccination after 2002.

Figure 2. Fluctuations over time in the proportion of IMD attributed to different serogroups in the USA.^{14,16,17,25,29} Footnote: Minor serogroups (serogroups other than serogroups B, C and Y) are grouped; there is a gap in the data available concerning these minor serogroups prior to 1997.

Figure 3. Fluctuations over time in the proportion of IMD attributed to different serogroups in Canada.^22,30

Figure 4. Incidence of IMD by age group in Canada.¹³ Footnote: The introduction of routine vaccination programs is indicated by the dashed vertical lines; however, some provinces introduced routine vaccination after 2002.

Figure 5. IMD case fatality rate and serogroup specific incidence in different age groups in the USA.¹¹

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