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. 2022 Nov 10;10(11):1901. doi: 10.3390/vaccines10111901

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© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Temporal trajectory of the COVID-19 pandemic in Bulgaria. (A) Confirmed cases over time (weekly); (B) officially reported and excess deaths over time (weekly); (C) CFR over time. Data on reported cases and deaths were obtained from the Our World In Data website [24]. (D) Evolution of the undercount ratio (excess mortality divided by official COVID-19 deaths) over time (note that the periods between waves, for which estimates of excess mortality are uncertain, are omitted from the graph).