Read Chapter 19 influenza: updated 24 August 2012 (PDF, 667K)
Chapter update patches
- Read patch update to Chapter 19 – 7 November 2011 (PDF, 159K)
- Read update patch to Chapter 19 – 26 October 2011 (PDF, 256K)
- Read update patch to Chapter 19 – 17 October 2011 (PDF, 452K)
- Read update patch to Chapter 19 – 28 September 2011 (PDF, 80K)
- Read update patch to Chapter 19 – 16 September 2011 (PDF, 57K)
- Read update patch to Chapter 19 – 29 July 2011 (PDF, 69K)
- Read update patch to Chapter 19 – 19 January 2011 (PDF, 464K)
- Read update patch to Chapter 19 – 24 December 2010 (PDF, 80K)
- Read update patch to Chapter 19 – 19 September 2010 (PDF, 177K)
- Read update patch to Chapter 19 – 29 October 2009 (PDF, 51K)
- Read update patch to Chapter 19 – 14 September2009 (PDF, 31K)
- Read update patch to Chapter 19 – 10 September 2009 (PDF, 173K)
- Read update patch to Chapter 19 – 30 July 2008 (PDF, 99K)
