* Five fatalities, taking the state's death toll to 771 and the national figure to 859

* They include two women in their 80s, a woman in her 100s, a man in his 70s and a man in his 90s, and all are linked to aged care

* 15 new cases with 10 linked to known outbreaks and five under investigation

* The number of new cases has been adjusted down from an initial 24 due to historical corrections, including duplications

* Of the 10 new cases linked to outbreaks, four are linked to aged care (Baptcare Wyndham Lodge, Estia Keilor, Japara Elanora and Edenvale Manor), four are linked to existing outbreaks (Alfred Hospital and Dandenong Police Station) and two are linked to complex cases which remain under investigation

* Of the 15 new cases, three are in Greater Dandenong, two in Manningham, Moreland and Wyndham, and single cases in Boroondara, Frankston, Melton, Moonee Valley and Whittlesea. One case is subject to further investigation

* 14-day rolling case average is lower at 29.4 for Melbourne and 1.1 for regional Victoria

* 14-day rolling average for cases with an unknown source is 41 for Melbourne and zero for regional Victoria

* 554 active cases in Victoria, including 14 in regional areas

* 75 people are in hospital, with eight in ICU including six on ventilators

* 75 active cases involving healthcare workers

* 284 active cases linked to aged care

* Four active cases linked to disability accommodation, all of whom are staff

* 4268 cases have an unknown source, no change from Tuesday

* About 2.6 million test results have been returned, an increase of 15,741 since Tuesday

KEY AGED CARE OUTBREAKS

* 256 cases have been linked to BaptCare Wyndham Lodge Community in Werribee

* 219 Epping Gardens Aged Care in Epping

* 166 Estia Aged Care Facility in Ardeer

* 140 Kirkbrae Presbyterian Homes in Kilsyth

* 131 BlueCross Ruckers Hill Aged Care Facility in Northcote

* 128 Twin Parks Aged Care in Reservoir

* 124 Cumberland Manor Aged Care Facility in Sunshine North

* 122 Japara Goonawarra Aged Care Facility in Sunbury

* 121 Estia Aged Care Facility in Heidelberg

* 108 Glendale Aged Care Facility in Werribee

OTHER OUTBREAKS

* 19 active cases currently linked to the Casey community outbreak (total cases: 43)

* 12 Footscray Hospital (18)

* 10 Alfred Hospital (11)

* 3 Dandenong Police Station (18)

POLICE FINES

* 83 fines issued in the last 24 hours, including eight for failing to wear a face covering, seven at vehicle checkpoints and 20 for curfew breaches

RESTRICTIONS

* Stage four across metropolitan Melbourne, including a 9pm-5am curfew, 5km travel limit, two-hour outdoor exercise limit, widespread workforce shutdowns

* People in Melbourne who live alone can nominate a friend or family member to visit

* Measures in regional Victoria allow residents to leave home without restriction and all shops to reopen. Also allowed are outdoor gatherings of up to 10 people, up to five visitors to a home, and an opening up of hospitality and entertainment venues with density limits

* Melbourne drivers who try to leave the city without a valid reason risk a $4957 fine. Melbourne residents can travel to regional Victoria for work

Sources: Department of Health and Human Services and Victoria Police.

Australian Associated Press