African countries have committed $120m to the effort, while the remaining funds are meant to come from international donors including the US, the UK and the EU.
Ebola is spread through direct contact with body fluids such as the blood or vomit of infected people, or dead bodies, such as during funeral preparations.
The situation is further complicated by conflict in DR Congo, mistrust towards officials in affected areas, widespread misinformation, and global aid cuts.
The response has been hampered by inadequate protective equipment and unpaid health worker wages, which have led to strikes in affected areas.
Kaseya stated that the unprecedented spread of the ongoing Ebola outbreak means the severe and often fatal illness could reach the UK and other countries.
The warning highlights the global stakes of the health crisis, with officials cautioning that inadequate containment could trigger massive economic fallout worldwide.
“If we have other countries affected we’ll be talking about trillions of dollars because it will require a lot of support to stop this outbreak,” Kaseya said.