Dengue fever is a viral disease transmitted through mosquito bites. It causes flu-like symptoms like fever, headache, and joint pains. A more severe form is dengue hemorrhagic fever, which can lead to bleeding and death. The disease is transmitted by the Aedes aegypti and albopictus mosquitoes. Mosquitoes breed in stored water and lay eggs that hatch within 10 days. Prevention involves eliminating breeding sites, protecting from bites with clothing and repellent, and draining standing water.