Pennington, Kate, Enhanced IPD Surveillance Working Group, and Communicable Diseases Network Australia. “Invasive Pneumococcal Disease Surveillance, 1 October to 31 December 2016”. Communicable Diseases Intelligence 41 (March 1, 2017): 114–119. Accessed April 12, 2026. https://ojs.cdi.cdc.gov.au/index.php/cdi/article/view/688.