Wimmera Health Care Group have been steady with their testing numbers, with "no real significant spike but a definite increase for a normal Tuesday," a spokesperson from the group said.

On Tuesday, July 14, 38 people were tested and on Wednesday, July 13, 41 people were tested.

The Health Department announced seven of the 10 cases on Wednesday morning, while later in the day Bacchus Marsh Grammar confirmed one of its staff members had also tested positive to the coronavirus.

A full list of the COVID-19 exposure sites are found here.

It is understood two of the staff member's family members also tested positive, bringing the total to 10.

All 10 cases are linked to current outbreaks - the first, starting at the Ariele Apartments complex where two COVID-19-positive Sydney removalists visited; and the second, a cluster that started with a Hume family who had returned from NSW.

Department data showed 15,161 COVID-19 vaccinations were administered on Wednesday and more than 27,000 test results were received.

From Thursday, anyone aged over 12 will be required to wear a mask in all indoor settings, including schools and workplaces, unless an exception applies.

Victoria's acting chief health officer Clare Looker announced the directive at 10.30pm on Wednesday.

"Here are steps we can take right now to protect ourselves and each other. That's why, face mask rules will change for Victorians aged 12 and above," Dr Looker said.

"Wearing a face mask will be mandatory indoors (not at home) unless an exception applies - this includes all workplaces, and secondary schools.

"Masks must also be worn outdoors if you cannot maintain 1.5m distance from people who aren't from your household (such as at an outdoor event)."

There are now more than 70 venues listed as COVID-19 exposure sites in Victoria as the state's health authorities try to contain another outbreak.

Health authorities added exposure sites at Barwon Heads, Campbellfield, Waurn Ponds, Highton, Broadmeadows and Craigieburn.

After dipping below 20 earlier in the week, Victoria's active cases are now at 26.

The new cases come after a school was forced to close its doors when a staff member tested positive on Wednesday.

More news:

Bacchus Marsh Grammar will close for two days as all teachers at a student-free staff day on July 12 have been told to get isolate and get tested.

NSW Health stated on Wednesday evening that Gundagai Coles Express, the Jindera Shell petrol station and the Shell petrol station in Hay had all been visited by "confirmed cases of COVID-19".

Anyone who visited Coles Express in Gundagai between 1am and 1.30am on Thursday, July 8 or the Shell petrol station in Jindera between 11.30am and 11.45am on Saturday, July 10 is considered a close contact.

They must get tested and immediately self-isolate for 14 days regardless of the result.

Any patron who visited the Shell petrol station in Hay between 7.30am and 8am on Saturday, July 10 is considered a casual contact. They must get tested and self-isolate until they receive a negative result.

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