Australia had a big breakout in one of its major cities (Melbourne) where the daily cases got up to 700 but a harsh lock down as soon as the spike happened has gotten it back down to just 14 cases yesterday. There were only 19 new cases, total, for the whole of Australia yesterday (population of 25M). If everyone does the right thing then it's shown it can bring it under control. My brother was telling me that when it's down to a really small amount every day, like it has been in other states in Australia, the government just tests like crazy in the area where a new case is shown and they make sure to keep it isolated from breaking out further.
Another crazy thing is that Australia has just come out of its flu season and the amount of lab-confirmed flu cases in August, 2019 was 61,000, but in August, 2020 there were only 107 cases.