Sutandhio, S., Wihanto, L., Tedyanto, C.P. and Santoso, S. 2025. In Vitro Analysis of SARS-CoV-2 Variants that Caused Severe COVID-19 in the Elderly. Indonesian Journal of Tropical and Infectious Disease. 13, 1 (Apr. 2025), 10–16. DOI:https://doi.org/10.20473/ijtid.v13i1.65484.