 So, good afternoon. I'm going to present, on behalf of a broad group of people, a description of a third consecutive outbreak of meningococcal sea in northern Nigeria of a brand new strain. So, our setting is northwest Nigeria. During the dry season, the harmaton winds off the Sahel, meaning it's very hot, dry and dusty. It is part of the meningitis belt in sub-Saharan Africa, where historically they've been explosive outbreaks of meningitis, meningococcal meningitis, primarily due to serogroup A. This led to the development and rollout of MenafriVac, a monovalent conjugate vaccine that stimulates long-lasting immune protection against serogroup A. The rollout of that is shown on the map here, with the different years in blue, in different colours of blue. So, the background for the outbreak in 2015 was two sequential localised outbreaks in the previous two years, each including sort of hundreds of cases, as shown in the graph. In 2013, the area's primary