This figure shows all notified cases of IPD in children aged less than 5 years in Australia between 2004 and the third quarter of 2015 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 occurring rarely in recent quarters. Disease caused by the six additional serotypes targeted by the 13vPCV increased steadily over the period 2007 to 2011 but have fallen since the 13vPCV replaced the 7vPCV in the universal childhood immunisation program.