Currently, the world is spreading the world of coronavirus (COVID-19) whose focus is in China. Every day, new sick and dead from it are reported in the world (currently 286803 infected in the world). At the same time, even though Russia has a common border with China, the number of infected in our country is not large (currently 254 people). This is because our government is taking measures to prevent the spread of the virus. (Coronavirus statistics) https://www.worldometers.info/coronavirus/coronavirus-cases/ 1) Closing borders. The main cause of the spread of the disease are carriers of the disease that travel around the world. Therefore, from January 31, the Russian-Chinese border was closed. Currently, entry to the territory of Russia is prohibited to all foreign citizens until May 1, 2020. 2) Quarantine. People arriving from countries where there is a chance of coronavirus infection are quarantined. Thanks to this, it is possible to identify the disease in its early stages and pro