Escalating Dengue Outbreak in Chittagong: Surveillance, Response Efforts, and Case Surge

Chittagong is facing a worsening dengue outbreak with 603 total cases confirmed from January to July 21, 2026. The number of cases in the first three weeks of July (305) has already surpassed the total for the preceding six months, resulting in two confirmed deaths. Health authorities have designated 8 city wards as 'red zones' following surveys showing significant Aedes mosquito larvae prevalence (26.76% of households and 33.04% of water containers). The outbreak, exacerbated by heavy monsoon rainfall, presents with atypical symptoms including exhaustion and severe abdominal pain, prompting coordinated public health interventions.