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The [[World Health Organization]] (WHO) is the latest manifestation of an international health organization. It was preceeded by the Health Organisation of the League of Nations in Geneva, which held its last meeting in 1938 just prior to the outbreak of World War II. A conference of allied nations was held in San Francisco just after World War II to establish the United Nations at which time the ''Charter of the United Nations'' was drafted. The allied nations also thought that a new international health organization should be formed. The WHO Constitution came into force in 1948 and the first World Health Assembly was held in Geneva in that same year to establish priorities for the new organization.<ref>

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