EN
Erich Wernicke was a close collaborator and friend of Emil von Behring. Their co-work is well described. The details o f his 20 years stay in Poznan are, however, much less known. Wernicke was a famous hygienist and immunologist. His stay in Poznan was characterized by transferring hygienic basic science which developed in the beginnings o f the 20th century in the daily life o f people for example on the field o f clean water and disinfection. From 1899 he was the chair o f the Hygiene Institute of Posen (Poznan) and from 1905 until 1908 he was rector o f the Royal Academy o f Posen (Poznan). His expertise helped to establish in Poznan a modern water supply system and water hygiene.