Howard J, Talley NJ. It is a race: and the vaccine is our only hope. Sydney Morning Herald, 30 May 2021. https://www.smh.com.au/natio nal/it-is-a-race-and-thevacci ne-rollo ut-is-cruci al-20210 530-p57wei.html (viewed Oct 2021). 2 McBryde ES, Meehan MT, Caldwell JM, et al. Modelling direct and herd protection effects of vaccination against the SARS-CoV-2 Delta variant in Australia. Med J Aust 2021; 215: 427-432. https://www.mja.com.au/ journal/2021/215/9/modelling-direct-and-herd-protection-effectsvaccination-against-sars-cov-2 3 Hanly MJ, Churches T, Fitzgerald O, et al. The impact of re-opening the international border on COVID-19 hospitalisations in Australia: a modelling study.