Irwinda, Rima, Achmad Kemal Harzif, Natasya Prameswari, Rabbania Hiksas, Angga Wiratama Lokeswara, and Noroyono Wibowo. 2022. “Serum Antibodies SARS-CoV-2 Spike (S) Protein Receptor-Binding Domain in OBGYN Residents and Effectiveness 3 Months After COVID-19 Vaccination”. Open Access Macedonian Journal of Medical Sciences 10 (E):1374-79. https://doi.org/10.3889/oamjms.2022.9931.