For twelve years, Dr. Wherret was a member of the executive committee of the International Union against Tuberculosis and a consultant to the World Health Organization. As President of the IUAT, Wherrett brought the World Tuberculosis Conference to Toronto in 1961.
Following his retirement, Dr. Wherrett wrote a book in 1977 entitled The Miracle of the Empty Beds: A History of Tuberculosis in Canada. This work remains the most exhaustive report on the fight against TB in Canada to-date, and was an invaluable resource in the preparation of this website.
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