Dengue is a viral infection transmitted by the bite of infected Aedes mosquitoes, particularly Aedes aegypti. It is common in tropical and subtropical regions, causing flu-like symptoms such as high fever, severe headaches, and joint pain. In some cases, it can lead to more severe forms, like dengue hemorrhagic fever, which can be life-threatening. Preventing dengue involves reducing mosquito populations and avoiding bites. This can be done by using insect repellent, wearing long sleeves, and eliminating standing water where mosquitoes breed. Awareness and community efforts are essential in controlling the spread of dengue and protecting public health.