For citations:

Sharoiko V.А., Stoma I.О., Kovalev A.A., Yarmolenko V.A. Analysis of the effectiveness of COVID-19 coronavirus vaccination in patients with chronic heart failure at the outpatient stage of treatment. Health and Ecology Issues. 2023;20(4):123–128. (In Russ.) https://doi.org/10.51523/2708-6011.2023-20-4-15