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The two vaccines are China's first batch of COVID-19 inactivated vaccines that have obtained clinical trial approval. Using killed pathogenic microorganisms for enhancing the immunogenicity, the vaccines have advantages of mature production process, controllable quality standards and wide protection range. 此次获批进入临床试验的两款灭活疫苗是我国首批获得临床研究批件的新冠病毒灭活疫苗，是一种杀死病原微生物但仍保持其免疫原性的疫苗，具有生产工艺成熟、质量标准可控、保护范围广等优点。 | 
