"As of 24 May 2004, the health authorities of Yambio County have reported a total of 19 cases, including 4 deaths, of Ebola haemorrhagic fever (EHF) in Yambio, Western Equatoria, south Sudan.
(...)
Currently, the outbreak appears to be restricted to the environs of Yambio; however, neighbouring countries have been notified. At this stage, WHO recommends no special restrictions on travel or trade as a result of this outbreak."
http://www.who.int/entity/csr/don/2004_05_24/en