Why aren’t gene therapies more common?

This week, a world first gene therapy treats rare Hunter syndrome. Could these personalised medicines be used more widely? We speak to Claire Booth, professor in Gene Therapy at Great Ormond Street Hospital. And high in the Chilean desert, the last bit of 13 billion year old light has hit the mirror of the Atacama Cosmology Telescope for the last time. Dr Jenifer Millard, a science communicator…