Trends and Patterns of Dengue Incidence and Mortality in Bangladesh: A Re‐Emerging Public Health Issue

ABSTRACT Background Bangladesh faced a rapid dengue outbreak in its history after the year 2020 which marked as a re‐emerging health issue. This study aims to assess the significant change of the trends and patterns of dengue incidence and mortality over the year from 2000 to 2025 in Bangladesh. Methods The publicly available government data were used from the Management Information System of the Ministry of Health and Family Welfare, Bangladesh, from 2000 to 2025. The data were cleaned, coded, and a descriptive analysis was performed using the Microsoft Excel. For assessing the significant trend of dengue cases, deaths, and case fatality rate (CFR), the Mann–Kendall test and Sen's slope estimator were conducted using the RStudio version 4.6.0 software. Moreover, Joinpoint regression software was used to analyze the temporal trends of dengue cases and deaths with p value less than 0.05 considered statistically significant. Results According to the findings, the highest dengue record cases and deaths were reported in 2023 where 321,179 cases and 1705 deaths occurred as highest in the history of Bangladesh. Females and the elderly were most vulnerable in 2023 and other years as well. The CFR was high among the older population aged 61+, as highest in 2024. Most of the dengue cases and deaths occurred from July to December. The dengue cases and deaths significantly increased over the year from 2000 to 2025. But the CFR was not statistically significant over the year. Conclusion Dengue significantly increased over the year and has become more fatal since 2020. More effective strategies are needed to prevent and control the exposure of cases and deaths of dengue. The policy suggests to enhancing the awareness programs for preventing dengue exposure and strengthening the health system capacity for government.