Murrumbidgee Local Health District director of medical services Len Bruce said it was "highly unlikely" that COVID-19 would be present in Victoria and not NSW.

"Even though there is a lot of focus on Melbourne and the Victorian outbreak ... we still need to be vigilant here," Dr Bruce said.

The border will be closed indefinitely from midnight on Tuesday as confirmed cases of COVID-19 soar in Victoria, with some exemptions in place for medical professionals and a permit system for those living in communities which straddle both states.

Dr Bruce said the MLHD was awaiting the official health order from NSW premier Gladys Berejiklian and he couldn't anticipate how long the border would remain closed.

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"I don't think anybody would like to close the border for any longer than is absolutely necessary," Dr Bruce said.

"But I wouldn't be surprised and I'm only speculating it wouldn't be less than two weeks because we will only really see the two benefits of a closure and, you know, two to three weeks time.

"We're obviously anxious about it, that there could be cases. So we'll we'll just need to wait and see ... what's going to happen."

NSW Health Senior Environmental Health Officer Tony Burns said the MLHD was working with transport providers to screen visitors with temperature testing and a questionnaire.

The MLHD extends to Albury which shares health facilities with Wodonga on the Victorian side of the border.

Almost 3000 people in the region have been tested in the last week as the second Victorian surge skyrocketed to a total of 2536 confirmed cases.

Twelve Victorian postcodes and nine public housing towers have been put into lockdown in order to prevent the spread of the virus in the state.