Melbourne has taken its first big step out of restrictions, with 127,000 more people allowed to head back to work today.

The number of active cases has fallen below 400 for the first time in nearly three months and the number of unknown mystery cases is also dropping.

And in positive news, the Premier Daniel Andrews says the city is about a week ahead of where they hoped to be.

So as restrictions are slowly lifted, can Melbourne keep numbers down?

On today's show:

* How cautious is the Victorian Government being as it moves out of lockdown?

* How useful is sewage testing for monitoring community spread of SARS-CoV-2?

* Any new information about climate and COVID?

* Can sniffer dogs detect coronavirus?