Melbourne family travels to SA after unknowingly visiting unlisted COVID-19 exposure site

A Melbourne family has been taken into hotel quarantine under police guard after they travelled to Adelaide after having unknowingly visited a coronavirus exposure site.

Additional exposure sites have been added across the Melbourne area after new COVID-19 cases linked to the Holiday Inn outbreak.

Marie and Raymond Ottone endured days of uncertainty after a confirmed case visited the Avondale Heights osteopathy clinic where their daughter Celine was treated on Friday morning.

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The trio flew to Adelaide to visit family on Saturday, when the location was not listed as a hotspot.

It wasn't until Tuesday that Victorian authorities contacted Celine to confirm she was a close contact.

Victorian authorities door-knocked the family to ensure they were isolating, but the clinic remains off the list of exposure sites.

South Australia Health became involved, with the trio told to stay in an enclosed room at a family member's home for the night before being transferred to a quarantine hotel yesterday with a police escort.

"What about everyone that she was on the plane with if she's a primary?" Ms Ottone said.

"What about the casino we went to and the shopping centres that we've been to here?"

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Victoria's coronavirus testing chief Jeroen Weimar said publicising the venue wouldn't be helpful and he was confident health authorities had identified anyone at risk.

"We do not think it is reasonable or any additional benefit to publicising public venues because we are not asking people to self identify, come forward and say 'I was there the day before after'," he said.

"That is not helpful. We are pleased the family is being supported in Adelaide."

Mr Weimar today confirmed a third case was linked to the hotel outbreak.

Meanwhile two earlier infections recorded this morning were confirmed to be the spouses of two food and beverage workers at the Holiday Inn.

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Sunbury saw a testing blitz yesterday after a Holiday Inn employee who tested positive to the virus visit several locations.

Today Mr Weimar said the as an act of caution authorities were counting the entire Sunbury shopping centre as an at risk location.

"We have decided out of an abundance of caution to expand the exposure site to the wider Sunbury shopping centre."

Mr Weimar said anyone who visited the area from 3.40pm to 4.30pm on Friday February 5 should get tested and isolate.

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One of the spouses confirmed to have the UK variant of the virus is understood to be linked to Camberwell Grammar school, although it has not yet been added to the exposure site list.

An updated list is expected later tonight.