Figure 2 - This figure shows all notified cases of IPD in children aged less than 5 years in Australia between 2002 and the second quarter of 2013 by quarter and the vaccine serotype group causing disease.. The figure demonstrates that quarterly notified cases have decreased significantly since the beginning of 2005, with disease caused by the 7vPCV extremely rare in recent quarters. Inversely, disease caused by the 6 additional serotypes targeted by the 13vPCV increased steadily over the period 2007 to 2011.