Australia's Victoria state has reported its biggest daily rise in Covid-19 cases this year, while some curbs are eased in Sydney despite persistent infections.

Hard lockdowns in Victoria will end once 70 per cent of its adult population gets fully vaccinated, expected around October 26, and authorities aim to hit 80pc before the November 2 Melbourne Cup, Australia's most famous horse race.

A total of 567 new locally acquired infections have been detected in Victoria, the majority in state capital Melbourne, up from 507 on Sunday, and one new death has been recorded. Daily cases have topped 500 for the past five days.

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