Mark Zuckerberg and Priscilla Chan pledge $3bn to end all disease - video

Facebook chief executive Mark Zuckerberg and his wife, Priscilla Chan unveil plan to spend more than $3bn over 10 years to 'cure, prevent or manage all disease within our children's lifetime'. Investments will include a bioscience research centre, plans for a microchip to diagnose diseases, continuous bloodstream monitoring and a map of cell types in the body.