The Ludwik Fleck Zentrum at the Collegium Helveticum in Zurich is conceived as a place for research on the life and thought of Ludwik Fleck (1896-1961). Fleck, a medical doctor and biologist, who ranks as a thought leader of present-day critical philosophy of science, is also known for achieving the production of vaccine against typhus fever under the conditions of the Lemberg ghetto in 1942.
After Fleck's dead in 1961, his papers stayed at the Israel Institute for Biological Research in Nes Ziona, near Tel Aviv, where Fleck had worked in his last years. But after the administrator of Fleck's inheritance, Marcus Klingenberg, was arrested and imprisoned as a spy for the KGB in 1983, all the papers got lost. Providencially, part of the material was photocopied by a researcher a few years earlier, who contributed it to the Ludwik Fleck Zentrum in 2005.
A cooperation with the Archiv für Zeitgeschichte (AfZ) of the ETH Zurich, made it now possible to access this material online in digital form. The material can be found at the AfZ under "Kopienbestände aus in- und ausländischen Archiven"/"Schweiz"/"Ludwik Fleck Zentrum". Unfortunately it is not possible to link directly to the collection. [The website of the Ludwik Fleck Zentrum provides information only in German, the digitized material at the AfZ is in Hebrew, Polish and German]