Which are the symptoms of Yellow Fever?

Symptoms of Yellow Fever

Yellow fever is a viral infection transmitted by mosquitoes. It primarily affects individuals living in tropical regions of Africa and South America. The disease can range from mild to severe, and in severe cases, it can be life-threatening. It is important to be aware of the symptoms of yellow fever to seek prompt medical attention if necessary.

1. Initial Stage: The initial symptoms of yellow fever usually appear 3 to 6 days after infection. This stage is often referred to as the acute phase and is characterized by:

• Fever


• Headache


• Muscle aches, particularly in the back and knees


• Chills


• Loss of appetite


• Nausea or vomiting


• Weakness and fatigue

2. Remission: After a few days, many individuals enter a remission phase where their symptoms improve. However, not everyone experiences this phase, and for those who do, it is often short-lived.

3. Toxic Phase: In some cases, yellow fever progresses to a more severe stage known as the toxic phase. This phase can be life-threatening and is characterized by:

• High fever


• Jaundice (yellowing of the skin and eyes)


• Abdominal pain


• Vomiting, sometimes with blood


• Bleeding from the nose, mouth, and eyes


• Decreased urination


• Bradycardia (slow heart rate)


• Seizures


• Delirium or confusion

4. Organ Failure: In severe cases, yellow fever can lead to organ failure, particularly affecting the liver and kidneys. This can result in:

• Jaundice becoming more pronounced


• Dark urine


• Bleeding disorders


• Shock


• Multiple organ dysfunction syndrome

5. Recovery or Death: Some individuals may recover from yellow fever after the toxic phase, while others may progress to a critical condition. The mortality rate for severe yellow fever can be as high as 50%.

If you experience any of the symptoms mentioned above, especially if you have recently traveled to an area where yellow fever is prevalent, it is crucial to seek medical attention immediately. Early diagnosis and supportive care can significantly improve the chances of recovery.