This document discusses dengue, a mosquito-borne viral disease. It notes that an estimated 50 million dengue infections occur annually, with approximately 2.5 billion people living in endemic areas. The disease is caused by any of four dengue virus serotypes and presents with a wide range of symptoms. Early recognition and timely intervention are key, as the clinical course can be unpredictable. Prevention relies on vector control measures and community participation in sanitation and waste management.