But if the virus does re-emerge into the region, Ballarat Health Services' contact tracing team is honing their skills helping Shepparton health authorities contact-trace their current outbreak.

They also assisted contact tracing teams in Kilmore last week and Castlemaine in July when cases appeared in their towns.

"We feel like we have got plenty of practice and that's working quite well," said BHS director of acute operations Ben Kelly. "All of these episodes have honed our skills so contact tracing is something we have become pretty proficient in."

The ease of the virus' spread has become apparent in recent weeks after it was revealed the same truck driver that spread the disease in Kilmore had also spread it in Shepparton.

However, he never told authorities he had been to Shepparton, meaning the virus could have spread greatly since he visited on September 30.

"We could just as easily find ourselves in the situation that Shepparton and Kilmore have found themselves in if people are doing the wrong thing," Mr Kelly said.

"Our advice is to continue to follow the rules - the rules are our greatest defence against COVID-19.

"Don't be complacent, continue to observe good hand hygiene, wear a mask, keep social distancing - all these things we have been doing so well for so long the results speak for themselves."

There have been no new COVID-19 cases confirmed in the Ballarat region for 51 days, and no active cases for 36 days.

Mr Kelly said health services across the state had been working together to help with contact tracing with Ballarat tracers working remotely, calling contacts of the confirmed cases.