Yellow Fever - Treatment and Prevention
Yellow fever is a real risk for US travelers heading to parts of Africa and South America, but one vaccine can protect you for life before you go.
Yellow fever vaccine
Yellow fever is a mosquito-borne viral disease that can cause severe illness and is found in parts of sub-Saharan Africa and tropical South America. US travelers heading to these regions face real exposure risk, especially those visiting rural or forested areas where infected mosquitoes are active. Because there is no cure once symptoms appear, getting vaccinated before your trip is the single most important step you can take.
WayPax Health is a full virtual travel clinic. Our licensed providers review your full itinerary, recommend the right vaccines and medications, and issue real prescriptions online. You never need to visit a clinic in person.
Get your Yellow Fever prescription and other travel medicines online today.How to prevent yellow fever
The yellow fever vaccine is the most effective way to protect yourself. A single dose provides lifelong protection, according to the WHO. The vaccine used in the United States is YF-Vax, and Stamaril is used in many other countries. Both are live vaccines, meaning they contain a weakened form of the virus that trains your immune system to fight it. The CDC Yellow Book recommends vaccination for all travelers going to endemic or transitional risk areas. The vaccine must be given at an authorized yellow fever vaccination center, and your provider will issue an official International Certificate of Vaccination or Prophylaxis (ICVP), sometimes called a "yellow card," which some countries require for entry.
Beyond vaccination, you can reduce your risk by using an EPA-registered insect repellent such as DEET or picaridin on exposed skin, wearing long sleeves and pants during the day (since the mosquitoes that carry yellow fever bite during daylight hours), and sleeping in screened or air-conditioned rooms. A WayPax provider can review your specific itinerary and confirm whether vaccination is recommended or required for your destination.
WayPax Health recommendation
WayPax Health offers the yellow fever vaccine (YF-Vax/Stamaril) with the required ICVP documentation for travelers heading to risk areas in Africa and South America. This vaccine is especially important for adventure travelers, safari-goers, backpackers, and anyone spending time in rural or forested areas where mosquito exposure is high. A WayPax provider can review your full itinerary online, confirm whether vaccination is recommended or required for your specific destinations, and issue a real prescription without you ever needing to step into a clinic. This is the same level of care you would receive at a traditional travel clinic, done entirely online and on your schedule. Do not wait until the last minute, since the vaccine should ideally be given at least 10 days before travel to allow full immunity to develop.
Get your Yellow Fever prescription and other travel medicines online today.
What is yellow fever?
Yellow fever is a viral disease caused by the yellow fever virus, a member of the flavivirus family (the same family as dengue and Zika). It is transmitted to humans through the bite of infected Aedes and Haemagogus mosquitoes, which are active during the day, according to the WHO. The incubation period, meaning the time between a bite and the start of symptoms, is typically 3 to 6 days.
Most people develop mild symptoms that go away on their own: fever, headache, body aches, nausea, vomiting, and fatigue. However, the CDC notes that about 15% of those infected move into a severe phase. Severe yellow fever can cause jaundice (yellowing of the skin and eyes, which is how the disease got its name), bleeding from the mouth, nose, and eyes, organ failure, and shock. About half of patients who reach this severe stage die within 7 to 10 days. Research published in PMC confirms that vaccination is the primary tool for preventing this outcome in travelers.
Where is yellow fever a risk?
Yellow fever circulates in two main parts of the world: sub-Saharan Africa and tropical South America. According to the WHO, 27 countries in Africa and 13 countries in Latin America are classified as high-risk for yellow fever outbreaks. Africa carries the largest share of the global disease burden, with most severe infections and deaths occurring on that continent.
In Africa, risk is concentrated in the tropical belt running across the middle of the continent, including West Africa, Central Africa, and parts of East Africa. Transmission tends to be higher during and just after the rainy season, when mosquito populations are at their peak. In South America, risk is highest in the Amazon basin and surrounding tropical forest regions, including parts of the interior of Brazil, Peru, Ecuador, Bolivia, and neighboring countries. Travelers who stick to major cities and coastal resort areas in South America generally face lower risk, but those venturing into jungle or rural areas face meaningful exposure. The WHO notes that the potential for international spread to currently unaffected regions remains a global health security concern, which is why many countries require proof of vaccination for entry.
Treatment: what to do if you get yellow fever
There is no specific antiviral drug approved to treat yellow fever in standard clinical settings. The WHO states that care is mostly supportive, meaning doctors focus on managing symptoms and preventing complications. This includes rest, fluids, treatment for fever, and management of liver and kidney problems. Antibiotics may be given if a secondary bacterial infection develops.
If you develop fever, headache, or jaundice after traveling to a risk area, seek medical care right away and tell your doctor where you have been. Do not wait to see if symptoms improve on their own. If symptoms return after a brief improvement, or if you develop yellowing of the skin or eyes, bleeding, or confusion, the CDC Yellow Book advises treating this as a medical emergency and getting to a hospital immediately. Early supportive care gives patients the best chance of recovery.
Frequently asked questions
What is the yellow fever vaccine for travelers?
The yellow fever vaccine is a live vaccine that trains your immune system to fight the yellow fever virus. A single dose provides lifelong protection for most people. Travelers going to risk areas in Africa or South America are strongly advised to get vaccinated, and many countries require proof of vaccination as a condition of entry.
How do I find a yellow fever vaccine near me?
WayPax Health is a full virtual travel clinic where you can get your yellow fever vaccine recommendation, prescription, and ICVP documentation entirely online. A licensed WayPax provider will review your itinerary and handle everything without you needing to visit a clinic in person. You can get started at any time from wherever you are.
Where can I get a yellow fever vaccine before travel?
WayPax Health makes it easy to get the yellow fever vaccine before your trip, all online. Our licensed travel health providers review your full itinerary, confirm whether vaccination is required or recommended for your destination, and issue a real prescription. There is no need to schedule an in-person appointment or search for a local clinic.
Do I need a yellow fever vaccine certificate for my trip?
Many countries require an official International Certificate of Vaccination or Prophylaxis (ICVP), sometimes called a "yellow card," as a condition of entry, as noted in travel medicine research. This certificate must be issued by an authorized vaccination center. WayPax Health can help you get vaccinated and obtain your ICVP documentation before your trip. Check your specific destination's entry requirements well in advance, since some countries require the certificate even if you are only transiting through.
Is yellow fever vaccination required for Kenya from the USA?
Kenya requires proof of yellow fever vaccination if you are arriving from a country where yellow fever is present, or if you have transited through one. Even if it is not required for your specific route, vaccination is recommended for travelers visiting areas with known transmission risk. A WayPax provider can review your full itinerary and confirm exactly what documentation you need before you fly.
What are the side effects of the yellow fever vaccine?
Most people experience only mild side effects after the yellow fever vaccine, such as a sore arm, low-grade fever, headache, or fatigue for a few days. Serious reactions are rare. Some people, including those over 60 and those with weakened immune systems, may face a slightly higher risk of rare but serious reactions, so it is important to discuss your health history with a provider before getting vaccinated.
Can yellow fever be cured?
There is no specific cure for yellow fever once a person is infected. According to the WHO, treatment is supportive, meaning doctors manage symptoms and try to prevent complications while the body fights the virus. This is why vaccination before travel is so important. Prevention is far more effective than any treatment available after infection.
How can I prevent yellow fever when traveling abroad?
The most effective prevention is getting vaccinated before your trip. Beyond the vaccine, you should use a DEET or picaridin-based insect repellent on exposed skin, wear long sleeves and pants during the day, and stay in screened or air-conditioned accommodations. Since the mosquitoes that carry yellow fever are daytime biters, protection during daylight hours is especially important.
Explore by region
West Africa
Central Africa
South America
Related diseases
- Malaria: also transmitted by mosquitoes and common across the same regions of Africa and South America where yellow fever is found.
- Dengue: spread by the same Aedes mosquitoes that carry yellow fever, with overlapping risk zones in Africa and Latin America.
- Zika: another flavivirus spread by Aedes mosquitoes in tropical Africa and the Americas.
- Chikungunya: a mosquito-borne virus with risk in many of the same tropical regions as yellow fever.
- Typhoid fever: a food and water-borne illness common in many of the same countries in Africa and South America where yellow fever is present.
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