Dengue Tops 5 Million at Mid-Year, a First, as Brazil Reports Third Consecutive Record

WHO's Week 25 bulletin shows dengue has crossed 5 million global cases at mid-year 2026, surpassing the entire 2023 annual total with six months remaining. Brazil alone has logged 3.1 million cases, its third consecutive record, as year-round transmission replaces the seasonal pattern that once defined the disease.