This is the 10th time since 1976 that Ebola has threatened the Democratic Republic of Congo, The Times reported.
At least four Ebola deaths are confirmed in the new outbreak, Health Minister Dr Oly Ilunga Kalenga said in a statement.
In this way, immunization will begin tomorrow and is aimed at front-line medical personnel, people who have had contact with confirmed Ebola cases and their contacts.
Confirmation that the current outbreak is caused by the Zaire species, and thus could be effectively combatted with the experimental vaccine, could come as early as Tuesday (August 7), according to Peter Salama, head of the World Health Organization's (WHO) Health Emergencies Programme in Geneva, Switzerland, ScienceInsider reports.
Health experts in the city closest to the new outbreak, Beni, have been setting up "cold chains" to keep the vaccines at the optimal temperature of minus 70 degrees Celsius, a challenge in a region with hot temperatures and unreliable power supplies.
A cross border meeting was also held to devise means of reducing the risks of the disease spread. The country's Health Ministry says 30 probable cases have been detected in the Beni area.
Among the ill were three healthcare workers, two of whom died.
The central African country has dealt with Ebola for decades and this is its tenth outbreak of the virus.
One of the biggest difficulties is geographical this time around: North Kivu Province borders Rwanda and Uganda, hosts more than 1 million displaced people, and has been the scene of intermittent fighting for decades.
There was a concern it would spread to Kinshasa - 364 miles (586km) south on the river, which has an global airport and 12 million people residents.
Despite that Ebola is never an easy illness to combat, the current outbreak is much more hard than previous ones primarily because of the location in which it appeared.