'We are very very vulnerable' says the brilliant science author and journalist Laura Spinney.

Her fantastic book 'Pale Rider: The Spanish Flu of 1918 and How it Changed the World' is a shocking account of the flu pandemic that killed tens of millions of people a century ago.

What was Spanish Flu and what lessons are there for us today? As the coronavirus sweeps across China this is a really important conversation about flu, anti-microbial resistance and whether we should be scared.