Hi guys, Welcome to the Advanced Video Search Engine, and you are watching 都是注射青霉素,为何中国要做皮试,而欧美却不用?. That video is uploaded by 星球课堂 at 2023-11-08T00:30:13-08:00. We are promoting this video only for entertainment and educational purpose only. So, I hope you like & enjoy it. [c6w_-4u5z6M]