Initially, efforts to combat the epidemic were hampered due to insufficient surveillance and laboratory services. WHO developed the Ebola Response Roadmap (ERR) that requested an estimated $490 million in order to create 160 isolation centers containing 1500 beds, to increase the diagnostic capacity to an estimated 600 samples monthly, and to assist approximately 13,000 health care workers in offering critical services and assistance, conducting active and passive surveillance, as well as establishing safe burial practice protocols.[28] For numerous reasons, WHO reduced the 2014-2015 ERR's budget by an estimated 51%.[28] At approximately the same time, the UN Mission for Ebola Emergency Response formulated a coordinated and unified operational framework to approach donors for funding.[29] In light of the reduced budget and associated constraints in available resources, major countries and public health coalitions donated and deployed much-needed resources and health care workers to supplement the overall effort.