Some aspects of specific prevention of a new coronavirus infection caused by the SARS CoV-2 virus in the Samara region

Abstract

The new coronavirus infection remains a significant medical and social event in the world, and only active immunization of the population with the achievement of the target level of vaccination coverage of at least 60% is able to stop its spread.Objective: to study the preliminary results of vaccination against a new coronavirus infection caused by the SARS CoV-2 virus in the Samara region.Materials and methods. The material of this study was the results of statistical monitoring of the incidence of a new coronavirus infection caused by the SARS CoV-2 virus in residents of the Samara region and data on the vaccination campaign. Statistical analysis included descriptive, comparative and interval estimation, as well as correlation analysis.Results. As of October 2022, 62.6% of the total population in the Samara region has been vaccinated against a new coronavirus infection caused by the SARS CoV-2 virus. Women predominated among those vaccinated – 60.51%. When analyzing the results of the vaccination campaign, statistically significant negative relationships were revealed between the proportion of vaccinated in a certain month and the incidence in the next three months, as well as between the accumulated percentage of vaccinated and the incidence in the next few months. At the same time, morbidity and vaccination in a normalized form for the population does not depend on the size of the population.Conclusions: Vaccination reduces the risk of a new coronavirus infection caused by the SARS CoV-2 virus in the Samara region by an average of 7.4 times. With the development of a manifest form of a new coronavirus infection caused by the SARS CoV-2 virus, in residents of the Samara region who have undergone a full course of vaccination, the risk of developing severe and extremely severe forms decreases by an average of 1.65 times, and deaths – by 1.71 times.