沃森生物：关于20价肺炎结合疫苗的保护效力须以效力临床试验的最终结果为准

Core Viewpoint - Watson Bio is advancing its 20-valent pneumococcal polysaccharide conjugate vaccine, currently in the preparation stage for Phase I clinical trials, building on its existing 13-valent vaccine [2] Group 1: Vaccine Development - The 20-valent pneumococcal conjugate vaccine includes seven additional serotypes (8, 10A, 11A, 12F, 15B, 22F, and 33F) beyond those in the 13-valent vaccine, aimed at preventing infections caused by a total of 20 serotypes [2] - The efficacy of the 20-valent pneumococcal conjugate vaccine will be determined based on the final results of efficacy clinical trials [2] Group 2: Other Vaccine Projects - The company is also preparing for Phase I clinical trials for its respiratory syncytial virus mRNA vaccine and its freeze-dried varicella-zoster virus mRNA vaccine, expected to receive approval for trials in October and December 2025, respectively [2]