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For informational purposes only — not medical advice
How serious?
Risk of death
Yes
Vaccine available?
Time to symptoms
Countries affected
Active outbreaks
Vaccination is the best protection and may be legally required for entry. Get vaccinated at an authorized center at least 10 days before travel. The certificate is valid for life (WHO 2016 amendment). Some countries require proof even for transit through endemic areas.
Acute viral disease transmitted by mosquitoes, occurring in the tropics. Can lead to severe complications and death.
Symptoms | Frequency | Severity | Onset |
|---|---|---|---|
| Back pain | 75% | Moderate | Early |
| Bradycardia | 35% | Mild | Early |
| Chills | 85% | Mild | Early |
| Fever | 95% | Moderate | Early |
| Headache | 90% | Moderate | Early |
| Myalgia | 80% | Moderate | Early |
| Conjunctivitis | 35% | Mild | Early |
| Dizziness | 40% | Mild | Early |
| Fatigue | 65% | Mild | Early |
| Loss of appetite | 50% | Mild | Early |
| Nausea | 70% | Mild | Early |
| Vomiting | 55% | Mild | Early |
| Abdominal pain | 14% | Severe | Peak |
| Bleeding gums | 11% | Severe | Peak |
| Hemorrhage | 10% | Critical | Peak |
| High fever | 12% | Critical | Peak |
| Jaundice | 17% | Severe | Peak |
| Petechiae | 9% | Severe | Peak |
| Confusion | 5% | Critical | Peak |
| Dark urine | 8% | Severe | Peak |
| Dehydration | 6% | Moderate | Peak |
| Hypotension | 4% | Critical | Peak |
| Oliguria | 7% | Severe | Peak |
| Seizures | 3% | Critical | Peak |
| Shock | 4% | Critical | Peak |
| biegunka | — | Critical | — |
| zołte gałki oczne | — | Critical | — |
| ból głowy | — | Severe | — |
| dreszcze | — | Moderate | — |
| nudności | — | Mild | — |
Yellow fever is an acute viral disease transmitted by mosquitoes, occurring mainly in tropical regions of Africa and South America. The disease can lead to severe complications including jaundice, hemorrhages, and organ failure.
Yellow fever is a viral disease transmitted by mosquitoes of the Aedes and Haemagogus genera. It occurs endemically in tropical regions of Africa and South America. The disease can progress mildly or severely, with symptoms of fever, jaundice, and hemorrhages.
High fever, jaundice, hemorrhages, consciousness disorders, breathing difficulties.
Most common signs and symptoms
Fever, headache, muscle pain, nausea, vomiting, jaundice, hemorrhages, kidney failure.
Knowing the symptoms is the first step to a quick response.
The disease can progress mildly (viremic phase) or severely (toxic phase) with jaundice and hemorrhages.
How this disease is identified
Diagnosis is based on clinical symptoms, laboratory tests, and serological tests.
Available treatment methods
Treatment is symptomatic - rest, hydration, antipyretics. In severe cases, hospitalization is necessary.
Most cases are effectively treated with early diagnosis.
How to protect yourself
Yellow fever vaccination, use of repellents, wearing long clothing, avoiding outdoor activities during mosquito activity hours.
Preparation is the best protection.
Before traveling to endemic areas, you should get vaccinated against yellow fever. Vaccination is required in some countries.
Statistics and geographic data
The disease occurs endemically in tropical regions of Africa and South America. It is estimated that 200,000 cases occur annually.
Who is most at risk
Traveling to endemic areas without vaccination, being outdoors during mosquito activity hours.
Potential complications
Severe complications include liver, kidney, and heart failure, hemorrhages, shock, and death.
Expected outcomes and recovery
Prognosis depends on disease severity. In mild cases, prognosis is good; in severe cases, mortality can be 20-50%.
This disease is vaccine-preventable. Effective protection is available through vaccination.
Talk to a travel health specialist about the recommended schedule before your trip.
Find a vaccination clinic →The content on this page is for informational and educational purposes only. It does not constitute medical advice, diagnosis, or treatment recommendations. If you have health concerns, consult a qualified healthcare professional. Medova is not a medical service provider.
Full terms of useGeographic distribution and active outbreaks
Recent epidemiological data from the World Health Organization Global Health Observatory.
Source: WHO GHO OData ↗
Source: WHO GHO OData ↗
And 11 more records
This data is provided for informational purposes. Please consult official WHO sources for the most current information.
View WHO data source →Know which vaccine you need? Great. Not sure? Just tell us your destination — we will figure it out and match you with a clinic. Free, no obligation.
| Flag | Country | Risk level |
|---|---|---|
 | Togo | High risk |
 | South Sudan | High risk |
 | Guinea | High risk |
 | Peru |
| High risk |
 | Côte d'Ivoire | High risk |
 | Ghana | High risk |
 | Colombia | High risk |
 | Uganda | High risk |
 | Cameroon | High risk |
 | Guinea-Bissau | High risk |
