Yellow fever is a viral disease transmitted by the bite of infected mosquitoes, particularly the Aedes aegypti species. Symptoms typically include fever, chills, loss of appetite, and muscle pain. In severe cases, it can lead to liver damage, causing yellowing of the skin and eyes, known as jaundice. 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, especially in parts of Africa and South America. Early diagnosis and supportive care are crucial for managing the disease.