Fosun Pharmaceutical Group Co. Ltd. has acquired a 73% stake of Antejin Biotech Co. Ltd. in a merger and acquisition deal worth up to ¥4.006 billion (US$626.2 million) to expand its pipeline in the field of bacterial vaccines. To kick off, Shanghai-based Fosun purchased about 32.52% equity interest in Antejin from nine shareholders for about ¥1.108 billion in cash.