TRIFONOVA, Iva; NGOC, Kim; GLADNISHKA, Teodora; IVANOVA, Vladislava; KUNCHEV, Metodi; MUTAFCHIYSKI, Ventsislav; CHRISTOVA, Iva. SARS-COV-2 SEROSURVEY AMONG BULGARIAN HEALTHCARE WORKERS BEFORE AND AFTER VACCINATION. PROBLEMS of Infectious and Parasitic Diseases, Sofia, Bulgaria, v. 50, n. 3, p. 24–28, 2023. DOI: 10.58395/2zpwv014. Disponível em: https://pipd.ncipd.org/index.php/pipd/article/view/50-3-4-sars-cov-2-serosurvey.. Acesso em: 19 may. 2024.