Eleven of the state’s twelve virus deaths have been in the region, the latest an 86-year-old woman on Wednesday, Premier Peter Gutwein confirmed.

Gutwein released findings of an investigation into the cluster, in which scores of health workers and hospital patients in Burnie tested positive.

“What the report confirms is that most likely that ‘ground zero’ for the outbreak at the North West Regional Hospital was the Ruby Princess,” he said.

Of the state’s 219 cases,146 have occurred in the northwest.

Gutwein said many healthcare staff at the North West Regional Hospital had symptoms while working but were unaware they had the virus.

“This is simply a case of people going about their lives, going about their jobs,” he said.

“This dreadful set of circumstances has ensued and has wreaked havoc and misery on so many people.

“Nobody should use this report to ascribe blame to anyone. What we have is a dedicated health workforce, what we have is a highly infectious disease.”

Tasmania’s first three fatalities, including two people at the North West Regional Hospital, had been passengers aboard the Ruby Princess.

The North West Regional Hospital and its private counterpart were shut earlier this month to undergo a deep clean, although some services have since resumed.

Twenty-one of the nation’s virus deaths were passengers on the cruise ship, which allowed disembarkation in Sydney before test results were returned.