1 National Centre for Immunisation Research and Surveillance (NCIRS), The Children's Hospital at Westmead, Westmead, NSW 2145, Australia.
2 Marie Bashir Institute for Infectious Diseases and Biosecurity, School of Biological Sciences and Sydney Medical School, University of Sydney, Westmead, NSW 2145, Australia.
3 Discipline of Child and Adolescent Health, Faculty of Medicine and Health, The University of Sydney, Westmead, NSW 2145, Australia.
4 Department of Family and Community Medicine, Faculty of Medicine in Rabigh, King Abdulaziz University, Jeddah 22252, Saudi Arabia.
5 Department of Infectious Diseases and Microbiology, The Children's Hospital at Westmead, Westmead, NSW 2145, Australia.
Historically, travel is known to be associated with an amplified risk of acquisition and transmission of infectious diseases, including pandemics [...].