Professor Czesław Gerwel (1909-1974) physician and outstanding parasitologist set the base of clinical parasitology in Poland and organized first in Poland hospital ward for parasitic diseases in Poznan (1962) first affiliated with Chair of Biology and Parasitology at Medical School and later functioning as an independent clinical ward, which he headed until 1970. He initiated organization of District Parasitological Clinics by setting first such a clinic in Poznań. He scientific work he focused on diagnostic problems as well as clinical pathology and treatment of parasitic diseases of gastrointestinal system. He participated in comprehensive studies of trichinosis. In 1941-1944 he was working in the National Institute of Hygiene in Warsaw, now National Institute of Public Health--PZH, which at that time operated under name "Das General gouvernerus Stattlichen Institut fur Hygiene in Warschau" in the section of typhus. He was involved in underground conspiracy of AK (Home Army) with pseudonym "Orlos" belonging to the group of people smuggling typhus vaccine produced in the PZH to Warsaw Ghetto and to underground troops. In 1942-1944 he studied medicine in Polish Underground University of Western Territories functioning in PZH under supervision of Feliks Przesmycki.