A base of data for viral epidemiological studies is presented containing correlation between outer symptoms (observable characteristics of the mass morbid phenomena), inner symptoms (characteristics of intensity of elementary processes implied in the virosis propagation) and influencing factors (risk or protective ones). A resolutive nucleus of processing these is divided in to three parts: an inductive one (specification of the mentioned correlations, of the mathematical model and its equation solutions); a deductive one (explaining or prognosing the epidemiological evolution); a decisional one (specifying the antiepidemic services, necessary for a possible or desired reduction of the morbidity).
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