The document discusses dengue fever and how it is transmitted by the Aedes aegypti mosquito. It spreads when a female mosquito bites an infected person and then bites others, infecting up to 10 people per day. Symptoms include joint pain, weakness, headache, high fever, rashes, and loss of appetite. The best way to prevent dengue is to eliminate mosquito breeding sites and not allow nurseries, which will reduce mosquito populations and the spread of dengue.