BUNIA, Congo (AP) — Ebola has killed more than 1,500 people in eastern Congo in the fastest-growing outbreak of the disease, data released Thursday showed, marking a 50% increase in around a week as the emergency continues to outpace response efforts. Delays in contact tracing, difficulties accessing affected areas, mistrust from communities and violence by armed groups and some residents have hampered the response, the Africa CDC said. Africa CDC Director-General Dr. Jean Kaseya said Thursday that 63% of confirmed deaths in the last two weeks occurred outside of treatment centers. In Ituri’s Nyakunde health zone, international partners supporting the Ebola response had to temporarily relocate after a July 15 attack on a hospital and a treatment center, sparked by a patient’s death. Officials say the relocation of these partners, including Africa CDC and Mercy Corps, has disrupted surveillance, contact tracing and supplies.