If we've learnt anything from the Victorian coronavirus situation, it's that COVID-19 loves clusters. The first known cluster of coronavirus was the Wuhan wet market in China, infecting more than 40 people. From there, in only a few months, it has spread around the world, infecting more than 9 million people. So how do these clusters start? And how do we stop them? On today's show: * What's the latest in Victoria? * Are multicultural communities getting enough official communication about coronavirus? * I live in a Melbourne hotspot. Do you have any tips on what measures I should take? * What is "routine testing"? * How do clusters or hot spots start? And Norman has some more on "R values" of coronavirus and the flu. He also makes a correction to some comments in yesterday's episode about where the protester at the Melbourne Black Lives Matter protest was infected.