Yellow fever is a viral infection transferred via the Aedes aegypti mosquito. Jaundice and fever are the symptoms from which the name is derived, and many people also experience headaches. Yellowing of the eyes and skin occurs during the second phase of the infection, where high fever returns and the liver and kidneys malfunction. There is a vaccine for the disease, but yellow fever is fatal for approximately 50% of those in the second stage.

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