Figure 82: Notified cases of invasive meningococcal disease, Australia, 2000 to 2011 This figure shows notifications of invasive meningococcal disease (IMD) in Australia from 2000 to 2011 and by serogroup. This figure demonstrates a decrease in notifications of IMD caused by serogroup C, following the introduction of the National meningococcal C vaccination program in 2003.