Every day when cases fall is a good day, and in NSW yesterday the numbers reduced in two key areas.

The first was the total number of new cases, and the second was the number of people out in the community while infectious.

However a single day does not make a trend, but the entire country is no doubt hoping that Sydney's outbreak has peaked.

Also on today's show:

* Origins of the coronavirus

* Warning for rare syndrome added to Johnson & Johnson label