Northeast Health Wangaratta and Albury Wodonga Health staff have been deployed to support the testing blitz in Shepparton.
It's the first time the health services have been called upon to do so.
Northeast Health's clinical services executive director Rebecca Weir said the support was part of a regional hub model.
"GV Health are the lead agency but obviously, they've been quite inundated with screening and swabbing," she said.
"Health services have provided assistance and we are providing three or four staff over at the screening clinics ... until Sunday, at the moment.
"Speed is really important in terms of containing the outbreak.
"It's enabled GV to respond really quickly and also set up further screening services.
"This is the first time that we've deployed staff as such, we do have a Hume Region Infection Control consultants who have been working across the region providing support.
"This is all part of a Hume region collaborative, and about the health services working together to benefit the whole community to contain any beak in a timely fashion."
Ms Weir urged anyone who has visited high risk areas as listed on the DHHS website to follow instructions and to get tested.
"Depending on which business you attended is dependent on whether you need to quarantine or not," she said.
"NHW is ready to respond and even though we're assisting GV Health, which we're happy to do, it hasn't compromised our services here [in Wangaratta].
"We've seen a 125 per cent increase in our own tests; we've got a mobile community, and some of those [tests] are directly related to the Shepparton outbreak.
"We're still running our own screening clinic, it's open seven days a week, and you need to make an appointment.
Ms Weir said regional Victorians should stay vigilant.
"It's a reminder to the community that COVID is very much still a real thing, and even though restrictions have eased in regional Victoria, we need to continually be mindful," she said.
"We need to social distance where we can, we need to wear a mask and wash our hands regularly, and stick to the rules."
The Shepparton cases are linked to the Chadstone cluster - the truck driver who infected people in the city contracted the virus through a close contact of that cluster.
IN OTHER NEWS:
The contact's test result was available on the 30th, but the truck driver had left for regional Victoria on September 20.
He became sick after he returned to his Melbourne home on September 30.
He had been in Kilmore, Benalla and Shepparton on that day.
No one in Benalla has tested positive after a business was identified as being a lower-risk exposure site.