Ahmed Ogwell Ouma, the acting head of the Africa Centres for Disease Control and Prevention, told journalists that a successful contact-tracing campaign was keeping the spread under control, the Bloomberg news agency reports.

Since the outbreak began in September, Uganda's health ministry has recorded 109 cases and 30 deaths.

On Wednesday, it was reported that six children in the same family in the capital, Kampala, had contracted Ebola.

Viruses can spread faster in densely populated areas and this particular strain of Ebola - called the Sudan strain - has no vaccine yet.

Earlier this month the districts at the epicentre of this outbreak, Mubende and Kassanda, were put under quarantine.