Madzharova I, Tifonova I, Dobrinov V, Grigorova I, Alexiev I, Grigorova L, et al. Dynamic of SARS-CoV-2 spread in Bulgaria, 2020-2022. Probl Infect Parasit Dis [Internet]. 2023 Aug. 14 [cited 2025 Apr. 6];51(1):5-10. Available from: https://pipd.ncipd.org/index.php/pipd/article/view/51-1-1-Dynamic-of-SARS-CoV-2