The delayed global response to the outbreak of Ebola in West Africa "increased the spread" of the virus, medical charity Medecins Sans Frontieres has claimed. In a report, published one year after the outbreak was officially declared, the charity suggests early calls for help were ignored by local governments and the World Health Organization. More than 10,000 people have died - nearly all of them in Guinea, Sierra Leone and Liberia. Tulip Mazumdar reports.