 As the ten-year ban on British beef exports is lifted, Professor Tony Minson from Cambridge University joins us to discuss what causes BSE, how it is spread and why it is such a problem. With another example of how animal diseases can be passed to humans is Dr Joanne Webster from Imperial College London who describes the life cycle of Toxoplasma gondii, how it makes mice as mad as hatters and a possible link to schizophrenia in humans. But it's not all doom and gloom as Professor Margaret Stanley from Cambridge University reveals how a cervical cancer vaccine is proving highly successful in clinical trials, and Derek Thorne has fun with food colouring in Kitchen Science.
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