Sitorus, R. J.; Wibisono, H.; Ridwan, H.; Antara, N. Y.; Panjaitan, M. N.; Sangalang, R. V. TRACING OF COVID-19 TRANSMISSION BASED ON CLOSE CONTACT POPULATION: CASES IN SOUTH SUMATRA: Penelusuran Penularan COVID-19 Dari Populasi Kontak Erat: Kasus Di Sumatera Selatan. JBE 2023, 11, 9-16.