For citations:
Kurylev A.A., Zhuravkov A.A., Kolbin A.S. Analysis of the effectiveness of vaccination against COVID-19 based on real-world data in St. Petersburg. Kachestvennaya Klinicheskaya Praktika = Good Clinical Practice. 2021;(4):80-84. (In Russ.) https://doi.org/10.37489/2588-0519-2021-4-80-84
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