Nikitin D P
Zh Mikrobiol Epidemiol Immunobiol. 1975 Feb(2):3-6.
Epidemiological regularities of individual intestinal infections--morbidity dynamics, the spread along the territory among the urban and rural population, seasonality--were conditioned not only by biological peculairities of the causative agents, but also but the influence of the social factors on the formation of the epidemic process.