Mrs Hancock is one of a dozen or so MPs still at parliament house to pass legislation today and said she "would be getting tested before returning to her electorate."

"We're just waiting to see what happens," Mrs Hancock said.

"We have been told to stay put. We've been locked in and told we can't leave."

The news comes after Northern Tablelands MP and Agriculture Minister Adam Marshall has tested positive to COVID-19.

"It's very uncertain at this time," Mrs Hancock said.

Read more: 11 new Sydney COVID cases announced

A vast difference to Kiama MP Gareth Ward, who didn't return to parliament this week, and has been able to go about his "business as usual" in his local electorate.

"I'll be getting tested before leaving Sydney," Mrs Hancock said, as she "didn't want the possibility of bringing anything back to the local area".

"Parliament House is such a busy area - ministers and staff are always in meetings, or passing each other in the corridors," she said.

"This Delta variant is so contagious we can't take any risks. We just have to play it safe."

Mrs Hancock said she was one of about a dozen MPs still at parliament house to pass legislation today.

"This is really the unknown," she said.

Read more: NSW minister tests positive to COVID-19

"I wouldn't be surprised if a testing station isn't established here within parliament house to test all the staff and MPs."

Despite the uncertainty and again the possible impact to the local tourism industry with the outbreak spreading on the eve of school holidays, Mrs Hancock is positive "we can get through it".

"Certainly, I'm concerned for businesses on the South Coast, especially as many people from the seven LGS in Sydney often holiday or come to our area," she said.

"They are no not allowed to travel and have to cancel travel plans for the holidays.

Read more: All NSW MPs ordered into isolation after Adam Marshall positive

"That again will have an impact on South Coast tourism and other businesses.

"My thoughts are with them all. But we just have to play it safe."

Mr Ward, who didn't return to parliament this week, said he has "no contamination concerns unless you can catch it [COVID] by talking on the phone".

"I'm totally clear and clean," he said.

"Shelley [South Coast MP Shelley Hancock] is one on the designated survivor list, the limited number of people asked to come into parliament to allow the house to continue to function."

Mr Ward did call for changes to allow parliamentary members to join meetings remotely or by Zoom.

"Parliament needs to come into the 21st century and this is a 21st century problem," he said.

"We can't allow archaic rules to get in the way of parliament doing its work, particularly if it means keeping the public safe.

"We have seen Federal Parliament able to do it, the House of Commons have done it, there shouldn't be any reason why the NSW Parliament can't do it as well.

Read more: If you live in Shoalhaven and work in Wollongong you have to adhere to restrictions

"I'd hate to think there would be some law or regulation that needed to change to deal with the immediate health crisis that couldn't be changed because the rules require people to be there in person.

"We now live in the 21st century and there is technology available that allows people to meet, speak and vote when it is required in circumstances like this."

Mr Ward also raised concerns for local businesses.

"I hope people down here continue to go about their business," he said.

"Continue to do the things they did yesterday and the day before but also continue to take the health advice and caution.

"If you have comorbidity, people shouldn't be afraid to wear a mask. People should continue to social distance and hand sanitizer practices."