Australia has not contained the coronavirus epidemic as well as it could have, given the tools at its disposal.

https://newsroom.unsw.edu.au/news/health/regaining-control-case-short-sharp-lockdown-rather-slow-trickle-weve-had-so-far

This is an edited version of a paper written in late March to outline the rationale for a short, sharp lockdown. The full version is here