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George Brock Chisholm CC MC & Bar (18 May 1896 – 4 February 1971) was a Canadian First World War veteran medical practitioner and the first Director-General of the World Health Organization (WHO). He was a strong advocate of religious tolerance and often commented that man’s worst enemy was not disease which he felt was curable as long as men worked together but man himself.Chisholm was born in Oakville Ontario to a family with deep ties to the region.