Is Yellow Fever?
Yellow fever is a serious, potentially deadly flu-like disease
spread by mosquitoes. It’s characterized by a high fever and jaundice. Jaundice
is yellowing of the skin and eyes, which is why this disease is called yellow
fever. This disease is most prevalent in certain parts of Africa and South
America. It isn’t curable, but you can prevent it with the yellow fever
the Symptoms of Yellow Fever
Yellow fever develops quickly, with symptoms occurring three to
six days after exposure. The initial symptoms of the infection are similar to
those of the influenza virus. They include:
- muscle aches
- joint aches
This phase usually lasts for three to four days. Common symptoms
- muscle aches
- joint aches
- a fever
- a loss of appetite
After the acute phase is over, symptoms will begin to go away.
Many people recover from yellow fever at this stage, but some people will
develop a more serious version of this condition.
The symptoms that you experienced in the acute phase may
disappear for up to 24 hours. Then, those symptoms will return, along with new
and more serious symptoms. These include:
- decreased urination
- abdominal pain
- vomiting (sometimes with blood)
- heart rhythm problems
- bleeding from the nose, mouth, and eyes
This phase of the disease is often fatal, but only 15 percent of
people with yellow fever enter this phase.
Causes Yellow Fever?
The Flavivirus causes
yellow fever, and it’s transmitted when an infected mosquito bites you. Mosquitoes
become infected with the virus when they bite an infected human or monkey. The
disease cannot be spread from one person to another.
Mosquitoes breed in tropical rainforests, humid, and semi-humid
environments, as well as around bodies of still water. Increased contact
between humans and infected mosquitoes, particularly in areas where people
haven’t been vaccinated for yellow fever, can create small-scale epidemics.
Is at Risk for Yellow Fever?
Those who haven’t been vaccinated for yellow fever and who live
in areas populated by infected mosquitoes are at risk. According to the World Health
Organization, an estimated 200,000 people become infected each year. Most
cases occur in 32 countries in Africa, including Rwanda and Sierra Leone, and
in 13 countries in Latin America, including:
Is Yellow Fever Diagnosed?
See your doctor right away if you’ve been traveling recently and
you experience flu-like symptoms. Your doctor will ask you about the symptoms
you’ve been experiencing and if you've traveled recently. If your doctor
suspects that you have yellow fever, they’ll order a blood test.
Your blood sample will be analyzed for the presence of the virus or
for the antibodies meant to fight the virus.
Is Yellow Fever Treated?
There’s no cure for yellow fever. Treatment involves managing
symptoms and assisting your immune system in fighting off the infection by:
- getting enough fluids, possibly through your
- getting oxygen
- maintaining a healthy blood pressure
- getting blood transfusions
- having dialysis if you experience kidney failure
- getting treatment for other infections that may develop
Is the Outlook for People with Yellow Fever?
estimates that 50 percent of people who develop severe symptoms of this
condition will die. Older adults and those with compromised immune systems are
most at risk for serious complications.
Is Yellow Fever Prevented?
Vaccination is the only way to prevent yellow fever. The vaccine
for yellow fever is given as a single shot. It contains a live, weakened
version of the virus that helps your body create immunity. The Centers for
Disease Control (CDC) suggests that anyone who is 9 months through 59 years old
and traveling to or living in an area where the risk of yellow fever is present
should be vaccinated.
If you’re planning to travel internationally, check the CDC website to see if you need to get any
Groups of people who shouldn’t get the vaccine include:
- people who have severe allergies to eggs,
chicken proteins, or gelatin
- infants younger than 6 months old
- people who have HIV, AIDS, or other conditions that
compromise the immune system
If you’re older than 60 and you’re considering traveling to an
area that may have the virus, you should discuss vaccination with your doctor.
If you’re traveling with an infant who is 6 to 8 months old or
you’re a nursing mother, you should either postpone travel to these areas if
possible or talk to your doctor about vaccination.
The vaccine is considered extremely safe. A single dose provides
protection for at least 10 years. The side effects may include:
- a mild headache
- muscle pain
- a low-grade fever
Other methods of prevention include using insect repellant,
wearing clothing to reduce the amount of mosquito bites, and staying inside
during peak times when insects bite.