the ebola virus is a member of a family of rna viruses known as
filoviruses.  symptoms of ebola hemorrhagic fever begin 4 to 16 days
after infection. persons develop fever, chills, headaches, muscle
aches, and loss of appetite. as the disease progresses, vomiting,
diarrhea, abdominal pain, sore throat, and chest pain can occur.  the
blood fails to clot and patients may bleed from injection sites as
well as into the gastrointestinal tract, skin, and internal organs.