The simulated exercise, held on Friday, came as it was revealed the number of confirmed COVID-19 cases in the region remained at 45, with 40 of those patients now considered to be "recovered".

Staff from the Murrumbidgee Local Health District, The Forrest Centre and NSW Ambulance, as well as GPs, joined in the exercise.

Evan Robertson, chief executive officer of The Forrest Centre, said facility residents were coping well as the pandemic continued.

"We do have restricted visits at the moment, which is a bit of a challenge, and that has been going for about a month or so now," Mr Robertson said.

"But we've done lots of other things like facetime visits and emailing backwards and forwards. There has been the odd compassionate visit too."

MLHD disaster manager Denise Garner said the simulation was an opportunity to make sure health officials were well prepared.

"By teaming up with an aged care facility, we can have our public health unit liaise with them. It helps them to understand each other's role in containment, should we end up having an outbreak in our region," she said.

Infectious diseases physician Timothy Gilbey has also reiterated the "critical" importance of ongoing COVID-19 testing.

"We're lucky in the Murrumbidgee, where we've had, relatively speaking, a low case number. We haven't had any dramatic outbreaks like we've seen in other areas and we'd like to keep it that way," Dr Gilbey said.

"We know that with the coronavirus, there's an increasing appreciation for its capacity to spread between people, not so much that don't have symptoms, but perhaps who have very minor symptoms that you might not otherwise pay attention to.

"With that in mind, we are supporting a very low threshold for testing of people with even very minor symptoms."