title: Cross-border vigilance on Ebola.
mesh_terms: D004196:Disease Outbreaks; D004641:Emigration and Immigration; D019142:Hemorrhagic Fever, Ebola / Q000453:epidemiology*; D006801:Humans; D007988:Liberia / Q000453:epidemiology; D008493:Medical Missions; D014944:World Health Organization