The highly transmissible Delta variant of the coronavirus has taken hold in Sydney with close to 4,000 infections since mid-June despite weeks of lockdown
The three-day snap lockdown for Brisbane, starting on Tuesday evening, comes on top of similar orders imposed in Sydney, Perth and Darwin residents in recent days
Australia has been relatively successful in curbing the spread of coronavirus, with only one nationwide lockdown during the pandemic so far and most regions now enjoying few restrictions.