[Perth, September 30. Image via Getty]

PERTH, AUSTRALIA - SEPTEMBER 30: An woman signs a consent form prior to being immunised with the Panvax H1N1 Vaccine during the launch of the National pandemic (swine flu) influenza vaccination campaign by the Minister for Health and Ageing Nicola Roxon at Swan Park Leisure Centre on September 30, 2009 in Perth, Australia. Four centres have been established by the WA Health Department to administer the new vaccine, which will be offered also in all States and Territories to anyone over the age of 10 free of charge from today. (Photo by Paul Kane/Getty Images)