High Levels of Anti-SARS-CoV-2 Receptor-Binding Domain (RBD) Antibodies One Year Post Booster Vaccinations among Hospital Workers in Indonesia: Was the Second Booster Needed? oleh Amila Hanifan Muslimah, Marita Restie Tiara, Hofiya Djauhari, Muhammad Hafizh Dewantara, Evan Susandi, Agnes Rengga Indrati, Bachti Alisjahbana, Arto Yuwono Soeroto, Rudi Wisaksana