Figure 2: Proportion of serogroups of confirmed invasive meningococcal disease, Australia, 2000-2016, by year
This Figure shows the proportion of total annual invasive meningococcal disease (IMD) cases caused by each of serogroups B, C, W, Y, and not groupable/not determined, each year from 2000-2016, colour coded, as a stacked bar chart graph. The graph demonstrates that before 2004, serogroup B and C were the predominant serogroups in IMD in Australia. After the MenC vaccination programme introduced in 2004, as the number (and proportion) of serogroup C cases greatly diminished, serogroup B became the predominant serogroup in IMD. Since 2012, the numbers and proportions of IMD cases caused by serogroup W and Y began to rise, whereby, in 2016, serogroup W became the predominant serogroup in IMD in Australia.