Pneumonia is an infectious disease transmitted by person-to-person route and is closely associated with climate in its development. Its incidence demonstrates high seasonality, i.e., higher incidence in the winter in the temperate areas and in the rainy season in the tropical areas [5,6,7,8]. Increased opportunity of contact with infected person from increased indoor activity, divergence of the survival and stability of pneumococci in the air, decreased host immunity and behavioral changes of individuals are suggested factors [9].