Figure 12: Number of calls to the National Health Call Centre Network related to influenza-like illness and percentage of total calls, Australia*, 7 July 2008 to 31 December 2009, by week This figure presents the number and proportion of calls to the National Health Call Centre Network that were related to ILI from mid-2008 to the end of 2009. It highlights that the number and proportion of calls started to increase in early May 2009, had an initial peak in the week ending 14 June 2009, followed by a peak in the week ending 19 July 2009. The timing of influenza-like illness call activity was consistent with the activity observed in influenza notifications, with the sub-peak coinciding with the pandemic phase change announcement to PROTECT.