Victorian health authorities have announced five new locally acquired cases of coronavirus as the state enters the third day of a seven-day circuit breaker lockdown.

The update on Sunday morning brings the total number of cases from the latest outbreak based in Melbourne to 40.

Victoria recorded five local cases on Saturday, with four linked to a food distribution delivery driver.

The number of vaccinations and test results reported on Sunday were lower than the records reported on Saturday of 21,626 vaccine doses administered and 56,624 test results.

The Victorian health department confirmed late on Saturday that it was testing an online booking system for vaccinations which it expected to launch soon.

The state’s chief health officer, Prof Brett Sutton, said last week that Victoria had the capacity to administer as many as 30,000 doses a day.