A. Ghiffari, C. Anwar, H. Hasyim, I. Iskandar, and M. T. Kamaluddin, “SARS-CoV-2 Variants of Concern Increased Transmission and Decrease Vaccine Efficacy in the COVID-19 Pandemic in Palembang Indonesia”, Acta Biomed, vol. 93, no. 1, p. e2022018, Mar. 2022, doi: 10.23750/abm.v93i1.12224.