The final 5 minutes of this episode of The Food Programme on Radio 4 is rather chilling in its explanation of how these zoonotic diseases happen and how they will continue to happen unless the world,and especially China, get their act together.
www.bbc.co.uk/sounds/play/m000gcwf
I didn't know that China's wildlife supply chain is now worldwide and that, therefore, many animals are now mixing with species alien to them.
I'd like to think China was doing something about this, but judging by this report on Bear bile, I'm not holding my breath.