Every day the latest numbers are nearly always higher than the total number of cases Tasmania has recorded since the start of the pandemic.

The news on Wednesday that 90 per cent of the new cases failed to isolate when feeling unwell is staggering.

It also makes perfect sense why this has been so hard to control.

These people were feeling unwell, and before they received a test or while they waited for their results, they chose not to isolate.

People in glass houses should not throw stones. And right now all of Australia is living in a glass house.

When Victorian Premier Daniel Andrews received this update, he must have felt deflated.

"The only thing you can do when you feel sick - the only thing that you can and must do when you feel sick - is to go and get tested,'' he said.

"Nothing else is acceptable. You must go and get tested when you feel sick. That is the only thing that you can and must do. And if people don't do that, then we will continue to see numbers increase. I'm being as frank, as blunt, as clear as I can."

It could be effortless to become complacent in Tasmania. But we must not remove those social distancing guidelines or health advice just because the numbers show us coronavirus is no longer prevalent in Tasmania.

An update on Tasmanian borders will be given on Friday by the Premier.

Two options are most likely - a date to reopen borders to "safe" states or territories, or they will remain closed beyond July 31.

Regardless of the decision, Tasmanians need to continue to be responsible and act responsibly when feeling unwell. While there are processes in place to avoid outbreaks, some quarantining relies on trust. There is room for error.

Let's continue to be safe, wash our hands and if unwell the only reason to leave the house should be to be tested. This collective action is our greatest weapon against this deadly virus.