The World Health Organization has declared the Ebola outbreak in the Democratic Republic of Congo and Uganda a Public Health Emergency of International Concern as the number of suspected cases and deaths continues to rise across eastern Congo. Regional health authorities have reported 393 cases and 105 deaths in Ituri Province suspected to be linked to the Bundibugyo strain, for which no approved vaccines exist. In its emergency declaration, WHO warned there are “significant uncertainties” surrounding the outbreak’s true scale and geographic spread, raising the possibility that transmission may be more extensive than current surveillance data indicates. The outbreak, centered in northeastern DRC’s Ituri Province, has increased fears of wider regional spread in an area marked by frequent population movement, trade, and displacement across the DRC, Uganda, and South Sudan. On Monday, the U.S.…