Objective: to identify the main trigger mechanisms of carcinogenic factors of biological nature and develop, on their basis, preventive measures to prevent the development of cancer in the population. Methodology for writing a review. A review 50 scientific papers posted in the databases Web of Science, Scopus, PubMed, CyberLeninka, eLibrary.ru were analyzed. The electronic search was carried out using a combination of keywords: "carcinogenic factors of biological nature", "viruses", "bacteria", "trematodes", "preventive work", "sanitary service", "oncological morality". The depth of searches in electronic databases and citation lists amounted to more than a 10-year period from 2013 to the middle of 2024. Conclusion. An analysis of the scientific literature showed that the trigger mechanisms in the pathogenesis of the formation of EIT caused by carcinogenic factors of biological nature lie in the ability of infectious pathogens to cause inflammatory reactions, turning into chronic infections that provoke the development of cancer among the infected population. Preventive measures, in the absence of specific vaccination, can be presented in the form of a set of preventive measures aimed at ensuring the sanitary, hygienic and anti-epidemiological well-being of the population.