The association between weather variability and Influenza incidence among young children in a low-income urban population in Bangladesh.

Background: While influenza outbreaks are generally linked to dry and cold weather in temperate regions, the cases in tropical regions are often detectable throughout the year with one or two epidemics during rainy seasons. Some studies speculate that such phenomenon may attribute to the different dynamics of transmission. However, the reason remains largely uncertain since the influenza seasonality in tropical regions is poorly understood and not as well documented as in temperate regions. Aims: This study is to assess whether the influenza incidence is associated with humidity, temperature, precipitation, and sunlight duration among young children in a low-income urban population in Bangladesh. Methods: Acute respiratory illness (ARI) data was obtained from a population-based clinic surveillance system in Kamalapur, an urban…