Adekayanti, P., Subronto, Y. W. and Ahmad, R. A. (2022) “COVID-19 serological epidemiology study at the IG Supermarket cluster in the Special Region of Yogyakarta”, BKM Public Health and Community Medicine, 38(03), pp. 69-76. doi: 10.22146/bkm.v38i03.1787.