The US Centers for Disease Control and Prevention issued a health alert about an outbreak in Uganda of deadly Sudan virus disease, a viral hemorrhagic fever that is in the same family as Ebola.

The U.S. Centers for Disease Control and Prevention on Thursday warned doctors and other healthcare workers about an outbreak of Ebola cases in Uganda.

Confirmation of Ebola Sudan in Uganda poses a high risk of further spread owing to the index patient's movements across multiple districts and healthcare facilities, the WHO said. It added that rapid containment is critical, because of Kampala's dense population and Mbale's location near the border with Kenya.

Uganda has begun a trial vaccination programme for the strain of Ebola viral infection that is behind Sudan's latest outbreak, according to the World Health Organization (WHO), while the number of confirmed cases has risen to three.

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Ugandan authorities have begun a clinical trial of a vaccine against the Sudan strain of Ebola that has killed one person in the outbreak declared last week.

U.S. health officials are telling Americans to take precautions if they travel to Uganda because of an Ebola outbreak

More than a dozen Americans in Uganda are also among those so far known to have been exposed to Sudan virus, the type of Ebola that had infected the initial case. Those people so