The on again, off again nature of Essendon AFL player Conor McKenna's COVID tests has been a wild ride this week.

McKenna had an irregular test result on Friday, then tested positive on Saturday. Then on Tuesday, tested negative.

So what's going on? Did he have COVID-19? Or has he been clear all along?

On today's show:

* How much can we rely on COVID-19 tests?

* What makes a super spreader? Is it biological or is it behavioural?

* I tried to buy a pair of jeans today but my size was "out the back in quarantine for another 24 hours"! Would putting clothes in a plastic bag for 48 hours kill off any coronavirus?

* Should people in the coronavirus hot spots leave their house to go to work?