Changsheng Biotechnology (300122.SZ): Adsorbed diphtheria vaccine approved for clinical trials.

Zhongtong Finance News, Zhifei Biological (300122.SZ) announced that the company recently learned that the adsorbed tetanus vaccine developed by its wholly-owned subsidiary Beijing Zhifei Green Bamboo Biopharmaceutical Co., Ltd. ("Zhifei Green Bamboo") has obtained the notification of approval for drug clinical trial from the National Medical Products Administration, which allows the product to conduct clinical trials for tetanus prevention.