During the incubation period which lasts 5-10days, no symptoms are apparent. After that patients develop a sudden onset, flu-like illness with fever, chills, headache and aching muscles. Nausea and vomiting are also common. The disease can then become increasingly damaging, causing jaundice, delirium, liver failure and extensive haemorrhage from day 5-7 from multiple sites, which can give rise to bloody diarrhoea and vomiting of blood (heamatemesis).
Attribution: Avallain