What is the population of the world affected by dengue?

Dengue fever affects millions of people worldwide, with estimates suggesting that around 390 million dengue infections occur annually. Approximately 96 million of these cases manifest clinically, leading to symptoms. The disease is prevalent in tropical and subtropical regions, putting about 3.9 billion people at risk of infection. The burden of dengue varies by region, with significant outbreaks reported in Southeast Asia, the Americas, and the Western Pacific.