Prepathogenesis of mass occurrence of disease as a complex happening is hiding the “screen”. Social influence remained hidden inside school «25. may», which had as a consequence shown higher distribution of manifested disease. As the main point at performance of events is scientism based on “black box system”. There is uncritical trust in paradigm, statistic methodology there comes “parroting”. Sheltered by screen content of the events, between the enter of the first (sub)system and exit of the final (sub)system the most critical maintain “mixed approach”, with the aim to reveal into the real dynamics by “natural happening of mass disease”, into “driving force” that is causes of self moving - spontaneous genesis of epidemics: a) for mass effects of it is 'natural work' (appropriate according to another effect, with accidentally casual effect of helping of appearance of disease) which contributes coherence and consistence of contagion and man who can get disease - what will result with binary 'causative link'; while the following cause is important b) the appearance of disease: pathogenic of contagion will reflect only after previous appearance of permanent 'immanent causative link'. Reconstitution of epidemic is final act, recapitulation of familiar natural happening of concrete epidemic with anterograde chronology how the event itself happened.

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