How does climate affect the prevalence of upper respiratory tract infections (URIs)?
Effect of Climate on Prevalence of Upper Respiratory Infections (URIs) In the USA, upper respiratory infections commonly peak in the beginning of late August or early September till March or April. In this bracket of period, fall and winter begin. Due to cold weather most of the time is spent indoors at work, home and school with humidifiers. Humid atmosphere creates ideal environment for the multiplication of virus. Therefore, viral pathogens become more active and infect healthy population.