Yellow fever is a viral disease transmitted between
humans by the bite of an infective mosquito.
Acute onset of fever
Hepatitis (inflammation of the liver)
in the urine)
followed by a brief remission, and then:
Recurrence of fever
In some instances:
Renal (kidney) failure
Generalized hemorrhages (bleeding)
Who gets yellow fever?
Yellow fever occurs only in the tropics.
America sporadic infections occur almost exclusively
in forestry and agricultural workers from occupational exposure in or near forests.
the virus is transmitted in three regions:
moist savanna zones of West and Central Africa during the rainy season
In urban locations and
In jungle regions (not as often)
How is yellow fever spread?
Yellow fever is transmitted between humans by the
bite of an infective mosquito.
How soon after exposure do symptoms
Symptoms occur within 3-6 days after infection with
How is yellow fever diagnosed?
Yellow fever is diagnosed by isolating the yellow
fever virus from tissues, blood, or other body fluid,
or, for those persons who have not been vaccinated,
by measuring specific antibodies in the blood.
What is the treatment for yellow fever?
There is no specific treatment for yellow fever, other
than supportive care.
How can yellow fever be prevented?
There are two actions travelers can take to avoid
General precautions to avoid mosquito bites
should be followed by everyone.
vaccine is not recommended for pregnant
women during the first trimester.
General precautions to avoid mosquito bites include
the use of insect repellent, protective clothing, and
Yellow fever vaccine is a live virus vaccine that has
been used for several decades. A single dose confers
immunity lasting 10 years or more.
The vaccine is
available at the Southern Nevada Health District Immunizations Clinic. If a person is at continued risk of
yellow fever infection, a booster dose is needed every 10 years.
Some countries require travelers to have received
yellow fever vaccine within the last 10 years as a
condition for entry. These conditions change periodically.
Consult your doctor, the Health District
or a travel clinic to learn of the current requirements
of the area(s) to which you will be traveling.
Where can I get more information?
Contact your physician or the Southern Nevada Health District, Office of Epidemiology at (702) 759-1300.
The Division of Quarantine, National Center for
Infectious Diseases, Centers for Disease Control and
Prevention has information on yellow fever and
other diseases of concern to travelers at http://www.cdc.gov/travel/index.htm.
This information is based on the Centers for Disease Control
and Prevention’s Information on Yellow Fever sheet (last