The modelling suggests we could open up with an 80% vaccination rate without seeing large outbreaks

Estimated cases and deaths under a scenario with effective reproduction rate in an unvaccinated population Reff = 5 and a vaccination rate of 80% (95% for over 70s)

Solid lines show the mean outcomes of simulation runs. Shaded areas show 10th and 90th percentiles of simulations
Chart: ABC News Source: Modelling by The Grattan Institute