Yellow fever vaccine is a vaccine that protects against yellow fever. Yellow fever is a viral infection that occurs in Africa and South America. About 99% of people develop immunity within one month of vaccination and this appears to be lifelong. The vaccine can be used to control outbreaks of disease. It is given either by injection into a muscle or just under the skin.
The World Health Organization recommends routine immunization in all countries where the disease is common. This should typically occur between nine and twelve months of age. Those travelling to areas where the disease occurs should also be immunized. Additional doses after the first are generally not needed.
Yellow fever vaccine is generally safe. This includes in those with HIV infection but without symptoms. Mild side effects may include headache, muscle pains, pain at the injection site, fever, and rash.