Suryanto, S., & Gugun, A. M. . (2023). DIFFERENCES IN S-RBD ANTIBODY TITERS OF SARS-CoV-2 POST-VACCINATION AND POST-COVID-19 IN UMY EMPLOYEES THAT DO GENERAL MEDICAL CHECK UP AT AMC MUHAMMADIYAH HOSPITAL YOGYAKARTA. Cerdika: Jurnal Ilmiah Indonesia, 3(7), 651–656. https://doi.org/10.59141/cerdika.v3i7.637