Australia reported its first locally contracted Covid-19 death of the year on Sunday and a 2021 record 77 new cases of the virus in the state of New South Wales, which is battling an outbreak of the highly infectious Delta variant.

State Premier Gladys Berejiklian said the numbers in and around the country's biggest city Sydney, already under a hard lockdown, are expected to rise.

Australia has fared much better than many other developed countries in keeping its Covid-19 numbers relatively low, seeing just over 31,000 cases since the start of the pandemic and 911 deaths.

The vaccination rollout, however, has been sluggish due to supply constraints and changing medical advice for its mainstay AstraZeneca shots.