[Black Agnes]

It also appears to be spread by mosquitos:

http://www.cidrap.umn.edu/infectious-disease-topics/vhf

“Pathogenesis

The pathogenesis of hemorrhagic fever viruses is not completely understood; however, key points include the following (Peters 2002):

Hemorrhagic fever viruses enter the bloodstream through various mechanisms (eg, the bite of a mosquito or tick, inhalation, mucous membrane exposure, parenteral exposure), and all (except hantaviruses) cause disease during the period of viremia.
The infectious dose for hemorrhagic fever viruses appears to be low (1 to 10 organisms) (Franz 1997).”

Which would explain the huge uptick in infection rate after the beginning of rainy season in West Africa on the graph a bit down this page:

http://en.wikipedia.org/wiki/2014_West_Africa_Ebola_outbreak

[Black Agnes]

It would also explain why the MD’s/health staff working in these clinics seem to be getting ill despite all the precautions being taken. Mosquitos bite the patients then bite the workers.