This figure shows the rate for serogroup C invasive meningococcal disease in Australia from 2007 to 2012 by select age group. This figure demonstrates that while there was an increase in the rate of IMD due to serogroup C in the 15 to 19 years and 20 to 24 years age groups, age-specific rates have been maintained at very low levels, with no age group exceeding 0.2 cases per 100,000 in 2012.