Odo Bujwid (1857–1942) — the founding father of Polish bacteriology. In 1886, he created the first Pasteur institute for the prevention of rabies in Poland and the second in the world, and soon established a similar institution in Kraków. An outstanding practitioner of bacteriology, he continued his own research, which enabled him to modify Ludwik Pasteur’s method of vaccination and also developed the production of serums and vaccines against other infectious diseases. The introduction of the diphtheria serum (1894), which was used to vaccinate thousands of children, was particularly important.