How is yellow fever acquired?

Yellow fever is acquired through the bite of an infected female Aedes aegypti mosquito. The virus enters the body through the skin and travels to the liver, where it replicates and causes damage. Symptoms of yellow fever typically develop within 3-6 days of the bite and can range from mild to severe. Mild cases may only cause fever, headache, muscle aches, and nausea, while severe cases can lead to jaundice, bleeding, and organ failure.