ed [13]. In HRT-18 cells, the antiviral activity of CQ against HCoV-OC43 had an EC50 of 0.306 (±0.091) μM, CC50 of 419.0 (±192.5) μM, and SI of 1.369 [14].
An in vivo study found that CQ could exert anti-HCoV-OC43 act