The race to combat Ebola

Despite available vaccines the latest outbreak of Ebola shows no sign of being contained. Dr Josie Golding is an expert on epidemic preparedness at the Wellcome Trust, and describes the challenges involved in rolling out an effective vaccine for the disease. And Dr Paul Stoffels is chief scientist at Johnson and Johnson, which makes an alternative to the main vaccine being used, and discusses why the company wanted to find a treatment for Ebola. Also in the programme, Boris Johnson will become the UK's next prime minister on Wednesday, after winning the Conservative party leadership contest. Our reporter Theo Leggett explains the implications for Brexit. We hear how some of the poorest countries in Africa may be losing out on millions of dollars in tax revenue, as part of a scheme involving companies using the Indian Ocean island nation of Mauritius to legally avoid paying higher taxes in the countries where they make their money. Plus we travel to Venice to hear how it has become a city on the frontline in the battle against overtourism.

(Picture: Medical staff at an Ebola treatment centre in Goma. Picture credit: Getty Images.)