There is high fever and severe headache for a day then sore throat, so severe they cannot swallow saliva. This is followed by diarrhoea, coughing and vomiting. Within three days the patient is very ill indeed, hallucinating, toxic, and usually starting to bleed. Like many other heamorrhagic fevers, they bleed from everywhere, teeth, eyes, nose, into the skin, into the intestines. They vomit black blood and pass bloody diarrhoea.
Most people die within five or six days.
Each epidemic has been different. With no care, fatality in some epidemics has been 90 per cent or more. In other epidemics as low as 60 per cent. The blood, sweat, urine, faeces, saliva, sputum are all loaded with virus and are infectious. It passes from the sick person to their carers, i.e. family members, nurses, doctors, lab technicians and funeral attendees.