Yellow fever, known historically as
yellow jack, yellow plague, or
bronze john, is an
acute viral disease. In most cases, symptoms include
fever,
chills,
loss of appetite,
nausea, muscle pains particularly in the back, and headaches. Symptoms typically improve within five days. In some people within a day of improving, the fever comes back, abdominal pain occurs, and
liver damage begins causing
yellow skin. If this occurs, the risk of bleeding and
kidney problems is also increased.