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Jo is joined by Professor Adam Hart from the University of Gloucestershire to do some more myth busting – this time on the subject of vaccinations.

Jo also visits the home of Dr Edward Jenner from Berkeley who discovered the vaccine for smallpox and finds out about his lasting legacy.

Plus there's more from Jo's chat with Dr Marieke Navin who is the head of programming of the Cheltenham Science Festival.

And in the Festival Flashback you’ll hear Jo’s interview with Ray Davies of The Kinks at the 2013 Cheltenham Literature Festival.