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世界卫生组织呼吁到2000年时让所有的人都保持健康,而提供许多第三世界国家的健康与死亡率的现行发展趋势的可靠信息则是为实现这一呼吁所作的一项关键性贡献。国际开发研究中心(IDRC)的一份专门研究报告详细地列出了人口普查、出生登记及保健服务等所提供的资料的种种缺陷.常见的问题有:资料所复盖的人口不完全、不均匀,对事件的报导不一致,以及信息流
WHO calls for all people to remain healthy by the year 2000, and reliable information that provides current trends in the health and mortality of many third world countries is a key contribution to this appeal. A special research report from the International Development Research Center (IDRC) details the various deficiencies in the data provided by the census, birth registration and health services. Common problems include: The population covered by the data is incomplete, not Uniform, inconsistent reporting of incidents, and information flow