G.M. Cauthen1, A. Pio2 and H.G. ten Dam3




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Division of Tuberculosis Control, U.S. Centers for disease Control, Atlanta, Georgia, USA.

Formely Chief Tuberculosis and Respiratory Infections Unit, Division of Communicable Diseases World Health Organization, Geneva, Switzerland.

Scientist, Tuberculosis Unit, Division of Communicable Diseases, World Health Organization, Geneva, Swirtzerland.

The figures have been redrawn for reproduction by Hans L. Rieder, Switzerland.

World Health Organization Genebra - Genebra - Switzerland