This site is currently implementing core features and is not ready for patient use yet.
This site is currently implementing core features and is not ready for patient use yet.
For informational purposes only — not medical advice
Get a free vaccination guide and nearby clinic recommendations — straight to your inbox.
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 ↗
This data is provided for informational purposes. Please consult official WHO sources for the most current information.
View WHO data source →| Flag | Country | Risk level |
|---|---|---|
 | Benin | High risk |
 | Guinea | High risk |
 | Democratic Republic of the Congo | High risk |
 | Sierra Leone | High risk |
 | Bolivia | High risk |
 | Gambia | High risk |
 | Senegal | High risk |
 | Angola | High risk |
 | South Sudan | High risk |
 | French Guiana | High risk |
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.
Traveling in less than 2 weeks? You can still get significant vaccine protection. Learn which travel vaccines work quickly, how to prioritize when time is short, and what your doctor can do in a single visit.
A comprehensive health guide for East Africa travel covering Kenya, Tanzania, and Uganda. Includes yellow fever requirements, malaria prevention, safari health tips, and recommended vaccines for a safe trip.
A comprehensive health guide for travelers to Brazil. Covers yellow fever vaccination requirements, dengue and Zika prevention, malaria zones in the Amazon, and food safety tips for a safe trip.
