My guest this week has just helped save the world! Dr Catherine Green OBE is one of the team in Oxford who developed and began manufacturing the AstraZeneca vaccine. Together with her colleague Professor Sarah Gilbert (now a Dame) she has just written a book 'Vaxxers' which explains in a rather thrilling and readable way, just how they did this, in the hope of communicating the science behind it and reassuring those who are vaccine hesitant at the moment. I was due to speak to Dr Green in person but two of my children got covid that very week, so instead we spoke down a line. Very frustrating not to actually meet her but with scientist Catherine Green - or Cath as she is more often known - even a glitchy line can't dampen her energy, enthusiasm and humour.

We talked about how she's never felt particularly 'mumsy'; how her friends looked out for her at the height of her work on the vaccine, leaving flowers or food on her doorstep for her; and how her 10 year old daughter Ellie has insisted they install a disco ball in the kitchen of their new house. Ellie sounds fabulous - clearly a girl after my own heart!

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