A union has urged people to be "judicious" when calling Triple Zero as COVID-19 impacts paramedics across the territory.
This comes as 1020 new cases of COVID-19 were announced for the ACT on Thursday.
Transport Workers' Union ACT Sub Branch secretary Klaus Pinkas said staff shortages were currently an issue.
He said paramedics were "under the pump".
"Our members are professional and are coping, but without a doubt resources are stretched," he said.
"Then you've also got the greater workload of people using the ambulance service. We urge people to have a think about whether they need emergency services.
"Now, obviously, if there's a real need, don't hesitate. But we do have examples out there of people tying up ambulance services for stuff they could have dealt with on their own, through a GP or presenting themselves to emergency."
However, an ACT Emergency Services Agency (ESA) spokesperson said personal protective clothing and deep-cleaning of [ambulance] stations and vehicles had ensured "minimal impact to personnel, including no staffing shortages within the ACT Ambulance Service".
The spokesperson said the agency was "committed to ensuring the health, safety and wellbeing of all personnel was prioritised".
"The ACT ESA continues to work closely with ACT Health to adhere to the latest health advice," the spokesperson said.
"All front-line and enabling services are quickly and thoroughly adapting to the evolving COVID-19 situation.
"We acknowledge the commitment and resilience of our members as they constantly adapt and continue to respond to the situation at hand."
Meanwhile, Mr Pinkas asserted that "resources are stretched".
"More ambulance services being used at the moment [due to] people calling ambulance with COVID symptoms," he said.
"It's not huge, but it's there. That's an increasing workload.
"So it's a dual thing, increasing workload and a reduction in staff."
Staff shortages have hit industries across the country as the Omicron variant has resulted in severe impacts on critical supply chains, including empty shelves in supermarkets.
At a National Cabinet meeting on Thursday, leaders were advised the nation could be looking at up to 10 per cent absenteeism from the workforce at the peak of the Omicron wave.
Previously, the federal government said that 20 to 50 per cent of trucking and logistics workers were out of action in isolation or affected by COVID.
To combat the risk of exposure to COVID-19, paramedics are currently required to wear heavy duty personal protective equipment.
"They're on the front line and they'll show up, they'll always help but [there are] a whole lot of measures that they can take to mitigate the circumstances," Mr Pinkas said.
"But it's obviously an issue when [paramedics are] dealing with a suspected positive or even confirmed, positive COVID case, but it's like all infectious diseases.
"So that ambulance will still show up to those cases, and take the necessary precautions."
When it comes to options, the union secretary said there was no immediate fix.
"You can't just snap your fingers and increase staffing levels, we're always into the government about increased resources for the ambulance service, whether there's a pandemic or not, the more resources the ambulance service has the better," he said.
"But in the short term, in the very short term, just put out the word to the general public to be judicious when they use the ambulance service.
"If there's a real emergency, don't hesitate in calling Triple Zero and getting getting an ambulance out there.
"But just be a little bit mindful that the service is under the pump when you want to use it."
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