The ongoing Covid-19 crisis has hit many sectors and industries in the hardest possible way. Travel and tourism-related activities have not been an exception. We contend that a systemic approach can be developed and implemented in order to trace and certify individuals who do not present an epidemiological risk to other people, and also to manage their close interaction. This could lead to the certification of a large proportion of the population-millions worldwide-as not representing a risk of infection to others. It can justify the implementation of a system that can speed up the reactivation of several economic sectors and industries, protecting jobs and accelerating economic recovery in many countries. People who have been ill with Covid-19 have acquired the corresponding antibodies and, therefore, have immunity to the disease, they could travel freely, thereby helping to reactivate the economy. We will explain in this paper how a number of high-tech tools can be implemented as a crowd control system to identify those who do not represent a risk to others, either because they have acquired immunity or because they can be regarded as not carriers of a communicable disease. We devise a method based on the use of a 3D-diagram that shows the existence of an inverse relation between the number of tests performed and the number of individuals that have contracted the disease. The results of the study suggest that the implementation of a new epidemiological tourist strategy in Cuba can help to reactivate tourist activities in the country while avoiding the creation of new hotbeds of infection for Covid-19.

The paper studied the features of introducing the concept of “lean production”. The authors consider, that this technology of management will allow to identify what the problems and the loss are characteristic for agricultural enterprises. The paper presents examples of optimization of agricultural enterprises using this concept.

This study aimed to investigate the influence of the microbial biohumus obtained from organic non-toxic wastes on the yield of three varieties of peppers, identification of the effect of biohumus on soil physicochemical parameters, to determine the ecological significance and economic feasibility of biohumus application. The photosynthetic activity of plants and accumulation of ascorbic acid in the tissues of peppers were investigated. The experiments in the vegetation cabin condition have been carried out according to the following variants: 1. Control, 2. Biohumus, 3. N60P60K60, 4. Biohumus + N60P60K60. The yield of a variety of Jermatnayin hska pepper in the vegetation cabin conditions in the Biohumus (237 c/ ha) variant was lower than in the “Biohumus + N60P60K60” variant and was higher from “N60P60K60” and “Control” variants (277c/ha, 229 c/ha, and 191c/ha respectively). The yield of a variety of Arajnek pepper in the Biohumus (286 c/ha) variant was lower than in the “Biohumus + N60P60K60” variant and was higher “N60P60K60” and “Control” variants (320c/ha, 265c/ha, and 228c/ha respectively). The yield of a variety of Loshtak pepper in the “Biohumus” (335.7 c/ha) variant was lower than in the “Biohumus + N60P60K60” variant and was higher in “N60P60K60” and “Control” variants (391.9c/ha, 314c/ha, and 239.8c/ha respectively).

Assessing the effectiveness of health systems is a relevant issue due to the recognition of health as the main human value, as well as the evidence of the impact of public health indicators on the socio-economic development of a state or region. Annually, analysts compile inter-country health ratings. The Most Efficient Health Care (Bloomberg financial and economic information agency), the countries ranking according to the level of medicine by the Health Care Index for Country (Numbeo) and the Euro Health Consumer Index (Health Consumer Powerhouse) are among the most respected countries in the world. Bloomberg Agency also compiles a rating of the healthiest countries (Global Health Index): in our opinion, this rating is the result of all ratings of health system performance, because the main goal of any country in the field of health is to maintain public health. According to The Most Efficient Health Care rating in 2018, Hong Kong, Singapore, Spain, Italy, and South Korea were in the top 5. Russia ranked 53rd of 56 in this ranking. Taiwan, South Korea, and Japan are the leaders in the latest published Health Care Index for Country ranking. Russia is on the 60th place out of 84. The leaders in 2019 according to the ranking of the healthiest countries (Global Health Index) are Spain, Italy, Iceland, Japan; Russia ranks 95th (of 169 countries). According to the Euro Health Consumer Index (EHCI), the leaders of 2018 are Switzerland, the Netherlands, Norway, Denmark (the rating does not include Russia). The methodology of each of the health system performance ratings is different, however, each rating is a guideline and subject of analysis for countries in order to adjust the implementation of state health policy. For this reason, the study and analysis of rating calculation methods and the assessment of the dynamics of countries' positions in them is an urgent task of modern scientific research, which as a result should contribute to improving the efficiency of the health system in individual countries.

The article provides an analysis of grain market capacity and its segments of the Republic of Tatarstan on the basis of different approaches to the methods of its determination. The determination of agricultural production market capacity is considered and justified as a first step in evaluating the attractiveness and selecting strategic areas of agrarian formations management.