The WHO said the outbreak affects an equatorial forest region in Bas-Uele province, bordering Central African Republic.
The last Ebola outbreak in Congo in 2014 was quickly contained and killed 49 people according to official figures.
“It (the case) is in a very remote zone, very forested, so we are a little lucky.
“We always take this very seriously,” said spokesman Eric Kabambi.
On 11 May 2017, the Min of Health of the Democratic Republic of the Congo notified WHO & partners of a lab-confirmed case of #Ebola#DRC
— WHO (@WHO) May 12, 2017