A protester at the Black Lives Matter demonstrations in Melbourne has tested positive to COVID-19.

Victorian health authorities say the man was unlikely to have acquired the virus at the protest and may have been infectious at the time.

Tracing possible contacts will be difficult, so what should people do if they were at the Melbourne protest?

And what does it mean for Australia's overall response to coronavirus?

Also on today's show:

* What should you do if you were at the Melbourne Black Lives Matter protest?

* Will there be a reduction in testing due to fear of testing positive and having to self-isolate?

* My grandparents won't take advice to wash their hands saying they survived the war. How do I convince them it's worthwhile?

And we continue our new segment talking about other countries and how they've responded to coronavirus. Today we're talking about Iran and fears that a second wave is already happening.