[1] Childrens Hosp, NCIRS Vaccine Preventable Dis, Westmead, NSW, Australia
[2] Univ Sydney, Discipline Pediat & Child Hlth, Sydney, NSW, Australia
[3] Dept Hlth Victoria, Hlth Protect Branch, Ararat, Vic, Australia
[4] Queensland Hlth, Hlth Protect Directorate, Communicable Dis Branch, Queensland Hlth Immunisat Program, Brisbane, Qld, Australia
[5] NSW Minist Hlth, AIDS Infect Dis Branch, Sydney, NSW, Australia
[6] SA Hlth, Immunisat Sect Communicable Dis Control Branch, Adelaide, SA, Australia
[7] WA Dept Hlth, Communicable Dis Control Directorate, Perth, WA, Australia
[8] Ctr Dis Control, Dept Hlth & Families, Darwin, NT, Australia