Fischer, R., Judson, S. Miazgowicz, K., et al. (2015). Ebola Virus Stability on Surfaces and in Fluids in Simulated Outbreak Environments. Emerging Infectious Diseases. 21(7):1243-1246.
The authors simulated environmental conditions and found that the Ebola virus remains active for a longer time on hospital surfaces than it does in African conditions. The virus also lives longer in liquid than it does in dried blood.