Physician – Pathologist, Immunologist, Virologist, Bacteriologist. Discovered acquired immunological tolerance – important for transplantation. Cultivated viruses on chorioallantoic membrane, determined inoculated material concentration. Red blood cells haemagglutination by viruses. Virus complexity. Neuropathogenicity transfer. Virus infections prevention. Typhoid fever agglutinin reactions. Isolated influenza A virus strain. Vibrio cholera receptor-destroying enzyme. Excellent teacher.