Get emergency medical help if you have signs of an allergic reaction: hives; wheezing, chest tightness, difficult breathing; swelling of your face, lips, tongue, or throat.
You should not receive a booster vaccine if you had a life-threatening allergic reaction after the first vaccine. Keep track of any and all side effects that occur within 30 days after you receive this vaccine. If you ever need to receive a booster dose, you will need to tell your doctor if the previous shot caused any side effects.
Seek medical attention right away if you have any of these symptoms similar to yellow fever that may occur within 10 days after vaccination:
fever, headache, confusion, extreme tiredness;
muscle pain or weakness;
a light-headed feeling, like you might pass out;
easy bruising, unusual bleeding;
little or no urination; or
vomiting, loss of appetite, jaundice (yellowing of the skin or eyes).
Becoming infected with yellow fever is much more dangerous to your health than receiving this vaccine. However, like any medicine, this vaccine can cause side effects but the risk of serious side effects is extremely low.
Call your doctor at once if you have any of these rare but serious side effects within 10 days after you receive the vaccine:
high fever, vomiting, increased sensitivity to light;
extreme tiredness, neck stiffness, seizure;
problems with walking, breathing, speech, swallowing, vision, or eye movement;
weakness or prickly feeling in your fingers or toes;
severe pain (especially at night); or
loss of bladder or bowel control.
Serious side effects may be more likely in older adults.
Common side effects (may occur within 5 to 10 days after vaccination) include:
low fever, general ill feeling;
mild headache, muscle pain;
weakness; or
pain, swelling, or a lump where the shot was given.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report vaccine side effects to the US Department of Health and Human Services at 1-800-822-7967.
 Yellow fever vaccine side effects (more detail)
