“…SARS-CoV-2 variants utilized in this study are EDB-2 (B1.5 at the time, now B.1), EDB-α-1 (B.1.1.7), EDB-δ-1 (B.1.617.2), and EDB-ο-BA.1-1 (B.1.1.529, BA.1) at passage 2 unless otherwise stated. 26 Infectivity was quantified by endpoint titration on Vero E6 cells (ATCC CRL-1586) with the exception of EDB-ο-BA.1-1 which was isolated and quantified on Caki-1 cells. Briefly, cells were plated to confluence 1-day prior to infection on 96-well plates.…”