Introduction
The urgency of the COVID-19 problem (CoronaVirus Disease 2019) is currently beyond doubt. In Russia alone, more than 4.5 million people have suffered from this disease, more than 100,000 of them died directly from the coronavirus infection. In general, almost 145 million people have been ill with COVID-19 in the world and more than 3 million patients died [1]. It should be noted, however, that these sad numbers are steadily increasing day by day. The severity of economic losses, given the quarantine measures that led to the collapse of many industries in many countries, can hardly be overestimated.
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