Dr Peter Stafford’s wife and four children are also being monitored for symptoms amid Ebola outbreak in Congo

An American doctor who contracted Ebola in the Democratic Republic of the Congo has been flown to Germany for treatment, along with his wife and four children, as the World Health Organization warned of the “scale and speed” of the outbreak.

Authorities have reported at least 134 suspected deaths and more than 500 cases of the hemorrhagic Bundibugyo virus, which has no approved treatments or vaccines. The outbreak, which has spread into urban areas, has been declared a public health emergency requiring international response.