Currently, the COVID-19 pandemic is characterized by a significant decrease in mortality, however, the scale of infection of the population with SARS-CoV-2 is many times higher than the results of previous waves, so scientific research related to understanding the fundamental principles of the processes of origin and development of COVID-19 is extremely relevant today and will remain relevant for a long time to come. The scientific community is actively discussing the paradoxical effect of an avalanche-like morbidity and mortality of the population in most countries that are at a high level of socio-economic development, one of the reasons for which may be the prevalence of overweight people. The authors carried out a correlation analysis of the relationships between the prevalence of overweight (OW) in men and women in 173 countries of the world, incidence and mortality, the value of gross domestic product (GDP) per capita of the state, and the human development index (HDI). A review of the state of the problem and our statistical calculations clearly indicate that the prevalence of overweight is accompanied by an increase in the incidence and mortality of the population from COVID-19. The level of incidence and mortality of the population is associated with an exponential relationship with the prevalence of overweight both among the male and female population of the state. The prevalence of overweight has a slightly stronger effect on the increase in morbidity compared to the increase in mortality. The degree of association between incidence/mortality and the prevalence of overweight among men/women in 2021 is lower than in 2020, but the difference is not significant. This suggests that large-scale vaccination of the population in countries with high GDP per capita and high HDI only marginally reduced the impact of OW prevalence on COVID-19 incidence and mortality. The prevalence of overweight in the population is directly proportional to GDP per capita and, to a greater extent, to the HDI. This, in the opinion of the authors, is one of the main reasons for the significantly higher incidence and mortality in countries with a high level of socioeconomic development/
The pandemic COVID-19 continues to take dozens of human lives and destabilize the economy on the planet. In this regard study of the patterns of external conditions influence on incidence dynamics will stay relevant for a long time. The existing views about the influence of atmospheric air temperature are controversial, owing to disparities in geological and climatic conditions for its formation. The data about incidence among population in 22 regions of the Russian Federation during the second wave of the coronavirus pandemic have been collected. There are conducted statistical research on the nature and degree of influence of air temperature on incidence of Russian population due to the COVID-19 pandemic. Statistical research of dynamics of ambient air temperature influence on human incidence depending on the latitude were conducted. At low negative temperatures (< –9.84 °C), an increase in air temperature leads, in most cases, to an increase in theincidence of COVID-19. At ambient air temperatures in the range from –9.84 to +25…+ 30° C, an increase in air temperature is most often accompanied by a decrease in the incidence of COVID-19, which is associated with a decrease in the infectious activity of SARS-CoV-2. The authors consider it necessary to conduct laboratory studies of the effect of negative temperatures on the survival and infectious activity of the SARS-CoV-2 virus in Russia, which will make it possible to predict the most dangerous infectious periods and determine methods to reduce the negative consequences of the COVID-19 pandemic. Research results lead to a better understanding of physical meaning of air temperature influence on COVID-19 incidence and give an opportunity to predict the periods of the most dangerous infection conditions.
In Russia, the fourth wave of the COVID-19 pandemic began, much more dangerous than all the previous ones, so the problem of vaccination of the population, as the main way to prevent incidence, is extremely urgent. The work statistically studied the dependence оf the population incidence of thirty countries in Europe, America and Asia on the level of vaccination of the population. The research results showed that on the territory of Western Europe for the once vaccinated population, the minimum required coverage of the population, providing a significant decrease in the incidence rate, is 70 %. For a double-vaccinated population, the minimum required vaccination coverage is on average 61 %. The most prominent, inevitable decrease in the incidence rate occurs when the entire population is covered by double vaccination in the range from 70 to 90 %. The vaccination threshold of 60 % (of the total Russia population) announced in the Russian Federation, according to the authors, will not be able to solve the problem of preventing the COVID-19 pandemic in our country totally.
Many articles by foreign authors, published in scientific journals with a stable international reputation, contain claims that smoking tobacco reduces the likelihood of infection with SARS-CoV-2. To study this issue, a correlation analysis was carried out to assess the dependence between the proportion of women and men who smoke in 94 countries located in Eurasia, North and South America, Australia, where more than 64 % of the world’s population lives, and the incidence and mortality of the population from COVID-19 during the period from February 1 to November 21, 2021. The results showed that an increase in the proportion of the population who smokes is always accompanied by an increase in morbidity and mortality among the world’s population. This tendency is especially pronounced in Europe, the USA and Canada, with the most detrimental effect of smoking on the growth of mortality. The results obtained allow us to reject with a high degree of confidence the conclusions about the protective effect of smoking from infection with SARS-CoV-2 and provide the media, medical, educational and educational institutions with additional arguments for informing the population about the negative consequences of smoking, especially during the COVID-19 pandemic.
As of 26 January 2021 146 836 524 coronavirus cases and 3 106 435 coronavirus deaths were officially recorded in 193 countries around the world. In this regard, obtaining new scientific knowledge about the patterns of climate influence on the results of the pandemic is extremely important. The developed original method allows determining the periods when climatic factors have had the greatest impact on human morbidity and mortality and calculating how much a particular parameter of the atmosphere has influenced the infection process and course of illness. The authors have used the methods of pair and multiple correlation to determine the nature and dependence of the morbidity and mortality levels on atmosphere pressure. The authors have carried out a correlation analysis of the dependence between atmosphere pressure and morbidity patterns due to COVID-19 in the Murmansk and Novgorod regions, Moscow, Saint Petersburg, Denmark, Belgium and Ireland. It has been proved that in two weeks period preceding the date of detection of morbidity there are necessarily two points in time at which atmosphere pressure has had the greatest impact on the results of morbidity. The authors have associated these extremes with the moment of infection and appearance of symptoms of morbidity. That allows making assumptions about the duration of the incubation period in different atmosphere conditions. For the first time based on statistical calculations it has been proved that the levels of morbidity and mortality may be related to the meteorological conditions that have been observed for 5–9 weeks before the facts of morbidity. The conducted research have allowed obtaining new scientific knowledge of influence of atmosphere pressure on the morbidity patterns of COVID-19. This creates the conditions for timely scientific forecasting of level of pandemic danger and action planning of an appropriate scale to be have made by the Executive authorities at all level to prevent mass infection of the population and reduce its negative consequences.
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