y. CQ functioned at the entry, and post-entry stages of SARS-CoV-2 infected cells [16]. In the same cell line, at different multiplicities of infection (MOIs, 0.01, 0.02, 0.2, and 0.8) of SARS-CoV-2, the EC50 for CQ (2.71, 3.81, 7.14, and 7.36 μM) was slightly lower than that of HCQ (4.51, 4.06, 17.31, and 12.96 μM). Consequently, the SI of CQ (100.81, 71.71, 38.26, and 37.12) was slig