Simon Flexner (left), Director of the Rockefeller Institute, New York, with Professor Neufeld (right), on his visit to the Robert Koch Institute, Berlin. Process print, 1932 (?).

In copyright

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Credit

Simon Flexner (left), Director of the Rockefeller Institute, New York, with Professor Neufeld (right), on his visit to the Robert Koch Institute, Berlin. Process print, 1932 (?). Wellcome Collection. In copyright. Source: Wellcome Collection.