For citations:
Karpova I.S., Stolyarov K.A., Popovtseva N.M., Stolyarova T.P. Territorial and Temporary Spread of COVID-19 in the World at the Beginning of the 2020 Pandemic. Epidemiology and Vaccinal Prevention. 2021;20(4):19-27. (In Russ.) https://doi.org/10.31631/2073-3046-2021-20-4-19-27
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