The Democratic Republic of Congo has received more than 16,000 doses of the Ervebo vaccine, with additional shipments expected, as it battles an unprecedented Ebola outbreak. The initial delivery of 16,250 doses arrived late Friday at the N’djili International Airport in the capital, Kinshasa.

These doses are part of an expected total of 70,000 from the World Health Organization and its partners. The current outbreak is caused by the rare Bundibugyo virus, which lacks a specifically approved treatment or vaccine. The Ervebo vaccine, while licensed for other Ebola strains and proven effective in past outbreaks, may offer some protection against this particular virus, according to the WHO.

The outbreak, which began earlier this year, has recorded 2,516 deaths out of 5,290 confirmed cases as of Friday. Health officials warn that the transmission rate is not yet peaking and could triple its current pace, potentially surpassing the 2014-2016 West Africa epidemic that claimed over 11,000 lives.

Efforts to contain the spread have been severely challenged by a confluence of factors, including ongoing armed conflict in key affected areas, attacks targeting medical personnel and facilities, a mobile population, and displacement caused by violence. A lack of critical infrastructure further complicates containment strategies. The Bundibugyo virus can spread easily and often goes undetected due to symptoms that mimic common illnesses like malaria.