With Greater Sydney in lockdown for at least another four weeks, NSW Premier Gladys Berejiklian said there were still 70 people infectious in the community.

She warned transmissions were still occurring in workplaces, households and in health settings.

"Based on those numbers we can only assume things are going to get worse before they get better," she said.

"We cannot continue to see the transmissions continue in these settings."

She warned of a stronger police presence and higher penalties for those who are not following the public health order rules.

"Police will also be given the power to close a public premise, worksite or business if they continue to flout the rules," she said.

There were 111,000 people tested in the 24 hours to 8pm on Wednesday.

"We are making it easier for people to get vaccinated. Please come forward for vaccination," Ms Berejiklian said.

"It is our way forward out of this."

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