The risk assessment came as the leader of the WHO team in Congo said the outbreak, which has led to over 130 suspected deaths, could last at least another two months as aid efforts intensified to stem the spread.

The WHO said the outbreak does not meet the criteria of a pandemic emergency but that countries sharing land borders with the DRC are at high risk of further spread.

With a rising number of cases, at least 80 suspected deaths and no approved vaccine, fears are mounting.