The virus contains proteins that mimic the proteins found in the coagulation pathway which causes the coagulation cascade to begin. As a result all clotting factors are used up. The spleen and liver harden into a clot. Kidneys clog and fail. The heart becomes overworked.
Blood leaks from every orifice and into the intestines, lungs, stomach, eyes, and beneath the skin.
Incubation is similar to Yellow Fever. The most common symptom in the United States is hypertension with chronic kidney failure. In the Four Corners outbreak, the disease had a very mild onset with flu-like symptoms, developing into lung hemorrhaging causing the infected person to suffocate in his or her own blood. Transmission is from animal to human. Over 63 bird and rodent vectors have been identified for the 70 known strains of the virus.