I mentioned some of the ways in which knowledge of dealing with these outbreaks has been acquired and improved on as a result of the outbreak in west Africa. Much of the expertise in Public Health England was drawn on very early in the previous outbreak in the Democratic Republic of the Congo. I reiterate that the response is running into challenges not because of a lack of expertise, a lack of vaccine or a lack of dedicated personnel willing to deliver it, but because of the conflict on the ground. People are attacking peacekeepers in the area. Therefore, we call on all participants to eschew violence and allow health workers to do the job that they need to do, because that is the real threat in this outbreak.