Quarterly distribution of dengue incidence and the relative risk estimates by national, zonal levels and by age groups in the western province in Sri Lanka.

Quarterly distribution of dengue cases per 100,000 population in the first (January to March) and the second (April to June) quarter in 2020 compared to that of five-year average (2015 to 2019). The average values are presented with their respective standard deviation (SD). Standardized incidence ratio (SIR) and meta estimated relative risk with 95% confidence interval are presented.