Scientists have successfully immunised mice against the deadly ebola virus which has killed thousands in Africa. They used virus-like particles (VLPs) which are non-infectious but are capable of triggering a strong response by the immune system. Usually lethal doses of ebola had no impact on the vaccinated mice. The study, by the US Army Medical Research Institute of Infectious Diseases, is published in Proceedings of the National Academy of Sciences. It looks like a virus, so you have the protective immune response, but it's basically an empty shell. The scientists hope their work will lead to a vaccine which will...