An estimated one quarter of persons worldwide are infected with Mycobacterium tuberculosis. In 2018, the World Health Organization issued revised guidance on BCG vaccine for high-risk groups. The World Health Organization should consider guiding countries on a case-by-case basis in developing appropriate BCG policies to deliver equitable healthcare and protect public health.

中文翻译：

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在高发病率国家和人群中需要接种卡介苗来预防结核病。

全世界估计有四分之一的人感染了结核分枝杆菌。2018年，世界卫生组织发布了针对高危人群的卡介苗疫苗修订指南。世界卫生组织应考虑根据具体情况指导各国制定适当的 BCG 政策，以提供公平的医疗保健和保护公众健康。