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1背景己研发出几种口服霍乱疫苗,且证明是安全有效的。目前仅有2种上市,其中一种在世界卫生组织(WHO)支持下己用于大规模人群接种。口服霍乱疫苗的使用能收集其作为公共卫生工具在保护高危人群中的效果和实施情况。同种疫苗己在一些国家获得批准,主要用于到霍乱地方性流行区的旅行者。生产这种疫苗的技术已从瑞典转到印度和越南,因此在印度注册了第二种疫苗。这拓宽
1 Background Several oral cholera vaccines have been developed and proved to be safe and effective. There are currently only two listings, one of which is already being used for large-scale population vaccination with the support of the World Health Organization (WHO). The use of oral cholera vaccines can gather information about their effectiveness and implementation as a public health tool in protecting high-risk populations. The same vaccine has been approved in several countries and is mainly used by travelers to areas endemic for cholera. The technology to produce this vaccine has been switched from Sweden to India and Vietnam, so a second vaccine has been registered in India. This widens