The initial symptoms of Ebola (which may include fever, diarrhoea and vomiting) mimic those of many common diseases, including malaria, pneumonia and gastrointestinal infections. Transmission occurs through bodily fluids: diarrhoea, vomit, blood and probably sweat and semen. Patients become infectious when they are symptomatic, and remain highly infectious until they begin to recover. Corpses are highly infectious.
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