Figure 2 -This figure shows all notified cases of IPD in children aged less than 5 years in Australia between 2007 and 2017 by quarter, and the vaccine serotype group causing disease. The figure demonstrates that quarterly notified cases have remained below 90 notifications per quarter since 2012 amongst this age group, with disease caused by the 7vPCV occurring rarely in recent quarters. Over the period 2007 to 2011, disease caused by the six additional serotypes targeted by the 13vPCV increased steadily, but have since fallen since the 13vPCV replaced the 7vPCV in the universal childhood immunisation program in mid-2011.