The World Health Organisation has declared a global public health emergency following a dangerous outbreak of the Bundibugyo Ebola strain.Over 390 suspected cases and 100 deaths have been recorded in the Ituri province since the virus originated near Mongbwalu.Containment efforts are struggling as the disease has crossed into Uganda and triggered a border closure by Rwanda.Authorities are establishing three new treatment centers to manage the virus while experts warn that no vaccine currently exists.