Efforts to develop a vaccine have been underway for months.  For the latest news on when it might arrive – and whether we'll need more than one - Neil McNeil speaks to Kate Bingham, Chair of the UK Vaccine Task Force; Dr. Helen Horton, Chief Research Officer at Touchlight Genetics Ltd and scientific advisor to the vaccine task force;  Saul Faust, Professor of Paediatric Immunology and Infectious Diseases at the University of Southampton, and Dr. Clive Dix, Vice-Chair of the UK Vaccine Task Force.