The head of the World Health Organization arrived in Congo’s capital, Kinshasa, on Thursday to bolster efforts against a growing Ebola outbreak in the Democratic Republic of Congo.

Authorities have reported 906 suspected cases and 223 suspected deaths from the Bundibugyo virus strain, which has no approved vaccine or specific treatment. The outbreak has been complicated by armed conflict, population displacement, food insecurity, and deep distrust among local communities toward health workers.

WHO Director-General Tedros Adhanom Ghebreyesus acknowledged the outbreak is “very complex” but insisted it “can be stopped.” He urged communities to work with responders while noting that the disease spread for weeks before being officially identified in mid-May.

Health officials reported some progress this week, including the recovery and discharge of one confirmed patient and the arrival of medical aid from the European Union and additional U.S. funding. However, responders continue to face challenges, including attacks on health centers and resistance to safe burial protocols that conflict with local customs.

The Trump administration has imposed temporary travel restrictions on individuals who recently visited Congo, Uganda, or South Sudan in response to the outbreak. The U.S. also announced plans to send exposed Americans to a facility in Kenya rather than back to the United States.