Yellow fever vaccine
![The junior deck officer Yellow Fever vaccination certificate. The vaccination was done in Cuba and on board of Soviet mv Toyvo Antikaynen on 18 of September 1985.](/Images/godic/202412/12/Soviet_International_Certificate_of_Vaccination_or_Revaccination_Against_Yello_Fever0450.jpg")
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.