Yellow fever is a disease caused by a virus that is spread to humans through bites of an infected mosquito. It is called ‘yellow fever’ because in serious cases, the skin or eyes turns yellow in colour.
Early symptoms of yellow fever include; fever, chills, severe headache, back pain, general body aches, nausea and vomiting, fatigue, and weakness. Most people recover after these initial symptoms within 3-4 days.
However, as the disease continues, about 15% progress to severe cases. Symptoms of severe cases include high fever, jaundice (a condition that involves yellow discoloration of the skin and the whites of the eyes), etc, and eventually shock and failure of many organs.