The billboard depicts a masked health worker in a biohazard suit looming over a bed-ridden patient. Above them, bright red letters warn commuters on a busy street in Abidjan, Ivory Coast, that: ?The Ebola risk is always there.? As the country tries to fend off an Ebola outbreak ravaging neighbouring West African states, such grim reminders of the catastrophe unfolding across its western border are everywhere. The worst recorded outbreak of the virus has killed more than 2,622 people in Liberia, Sierra Leone and Guinea and has also spread to Nigeria and Senegal. Yesterday it was confirmed there were 5,335 cases diagnosed, though that figure may be inaccurate as most patients are at home ? and...