WHO Director-General Dr. Tedros Adhanom Ghebreyesus visited Bikoro on Sunday and positively assessed the speed with which the government of the Democratic Republic of Congo declared the outbreak.
The WHO also confirmed 39 suspected cases.
This is Democratic Republic of Congo's ninth outbreak of Ebola since the discovery of the virus in the country in 1976. The virus can spread rapidly through direct contact with bodily fluids of a person who is infected with or died from EVD. It was tested in Guinea in 2015 during an Ebola epidemic that killed more than 11,300 people in Guinea, Sierra Leone and Liberia.
On Friday the United Nations health agency had announced that it was preparing for all scenarios, including the "worst case scenario", in the latest Ebola outbreak in DR Congo.
"However, any country facing such a threat may require global assistance".
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"I'm in contact with the Minister of health and have assured him that we're ready to do all that's needed to stop the spread of Ebola quickly".
Concise News gathered that the outbreak was first confirmed by the organisation on May 8 with the two cases occurring at Bikoro health zone, Equateur province. This is an area where people connect, trade and travel - an environment ripe for spreading disease, the BBC reported.
The vaccine was developed by the Canadian government and is now licensed to the USA -based Merck.
Ebola is one of the world's most notorious diseases, being both highly infectious and extremely lethal.
World Health Organization says it has alerted countries surrounding DR Congo about the outbreak to enable them to take precautionary measures to prevent spread.