B. Balint, M. Todorović Balint, Z. . Andrić, M. . Jovičić, G. . Blagojević, and M. . Čolić, “Long-term antibody-response monitoring following primary exposure to SARS-COV-2 and afterward mRNA COVID-19 vaccination: A case report”, Vojnosanit Pregl, vol. 78, no. 3, Apr. 2021, doi: 10.2298/VSP200220019B.