What is the difference between yellow fever and dengue?

Yellow fever and dengue are both viral diseases transmitted by mosquitoes, but they are caused by different viruses and have distinct characteristics. Yellow fever is caused by the yellow fever virus and can lead to severe liver damage and bleeding, with a vaccine available for prevention. In contrast, dengue is caused by the dengue virus and primarily results in high fever, severe headaches, and joint pain, with no specific vaccine widely available at all times. Additionally, yellow fever is more prevalent in Africa and South America, while dengue is found in tropical and subtropical regions worldwide.