Petrovich Garnov, A. .; Alekseevna Prodanova, N. .; Yuryevna Garnova, V. .; Yurievna Kamchatova, E. .; Ivanovna Zatsarinnaya, E. . PANDEMIC OF THE TWENTY-FIRST CENTURY: : WORLD-CLASS SOCIO-ECONOMIC CRISIS. GEI 2020, 1.