With 14 exposure sites, AWH Local Public Health Unit executive director Lucie Shanahan said the situation was being monitored closely.

"There is one household contact of the positive case, who has been in isolation since the positive result was returned and has been tested," she said.

"The positive case is a patient in a hospital outside the region.

"More than 800 swabs were taken yesterday through Northeast Health Wangaratta testing sites, many of which are still being processed, due to the high demand.

"We encourage people to continue to check the coronavirus.vic.gov.au website for information on Wangaratta exposure sites regularly."

The dozen Northeast Health Wangaratta staff who were isolated after the man presented to their ED have returned negative results, but remain in isolation until they are cleared by the LPHU.

Acting chief executive Robyn Gillis said testing demand had decreased slightly on Thursday but an additional showgrounds site would continue operating.

"Another site was added yesterday, the Kmart site ... that may prompt a few more people to be tested," she said.

"In an ideal world, those results would be back in 24 hours, but what we are experiencing is it may take up to 72 hours."

Wangaratta supermarket workers were among those awaiting test results, although many will have to isolate for 14 days regardless.

IN OTHER NEWS

Bunnings Wangaratta, which was listed as an exposure site on Tuesday night after the case visited on Saturday, closed for a period of time today while the Department of Health reviewed the store's cleaning certificate.

An additional deep clean took place on Tuesday and Wednesday night using antiviral disinfectants and Victorian Bunnings stores have continued to undertake deep cleans on a daily basis.