British PM Boris Johnson’s health has deteriorated as he enters the second week of being diagnosed with COVID-19.

The 55-year old's experience is what many people have gone through, but it shows the dangers people often face in the later stages of trying to fight off the virus.

Today, Dr Norman Swan explains why it is known as the second week crash.

On today’s episode:

* If soap and water kills coronavirus why not just wash medical clothing?

* If the acids in the gut kill this virus, why does faeces still have it?

* Why has coronavirus spread so far across the world and not to the rest of China?

* Why are people across the world spraying disinfectant on streets?

* What is happening in Japan and Sweden where they appeared to have a handle on the virus, but are now experiencing a rapid uptake

And Tegan gives us a rundown of how scientists have come up with a way to "hear" the virus which causes COVID-19.