HONG KONG – Incheon, South Korea-based Celltrion Inc. will start manufacturing its COVID-19 treatment for clinical trials and commercial distribution, even though it’s only reached phase I. The phase I trials testing the in-house antiviral antibody treatment CT-P59 began on July 17, the same day the company received approval from Korea’s Ministry of Food and Drug Safety (MFDS) for its investigational new drug application on the back of positive preclinical results.