Yellow fever is a viral disease transmitted by the bite of infected mosquitoes, primarily the Aedes and Haemagogus species. It is characterized by fever, chills, loss of appetite, and muscle pain. In severe cases, it can lead to liver damage, resulting in jaundice and bleeding. Vaccination is the most effective way to prevent yellow fever. The yellow fever vaccine provides long-lasting immunity and is recommended for travelers to areas where the disease is common, particularly in parts of Africa and South America. Early diagnosis and supportive care are crucial for managing symptoms and reducing complications.