The Role of Infections in Human Pathology

Infectious diseases, due to their epidemic potential, are capable of global spread, they are unpredictable, and their effective control is possible only on a planetary scale. In no other field of medicine, such radical and often unpredictable changes occur in a short time in the form of the elimination of individual diseases, the identification of a large number of previously unknown and the return of already forgotten diseases, a significant change in the pathogenesis and clinical symptoms of a significant number of them. Under these conditions, these changes often create problems for the health authorities and the public, ahead of their ability to recognize and respond in a timely manner to the emergence of epidemics and the transformation of pathological manifestations. Significant recent scientific progress has only slightly clarified our knowledge of the biological and genetic diversity of pathogens. Until now, the entire spectrum of infectious pathology remains unclear, and its numerous manifestations often take even experienced specialists by surprise. Evidence of our limited knowledge and ability to control the situation is the ongoing COVID-19 pandemic for three years now, the increasingly frequent detection of “new” infections, the return of infections declared defeated, evidence of the role of infectious factors in the etiology of many other human diseases.