Prof. Dr. Jan Potempa Head of Microbiology Department, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland and Distinguish University Scholar, Department of Oral Immunity and Infectious Diseases, University of Louisville School of Dentistry, Louisville, KY, USA. As a KOL in his area Prof. Potempa has 38 years of research experience with a scientific track record exciding 450 publications in peered reviewed journals, which were more than 20,000 times cited (h-index 75). His work concentrates on virulence factors of bacteria and he discovered new families of enzymes (gingipains, interpains, KLIKK-proteases, staphopains, PPAD) and protease inhibitors (staphostatins and potempins), which contribute to the pathogenicity of Staphylococcus aureus and periodontal pathogens. Prof. Potempa’s other interests are focused on bacterial pathogens interaction with the innate immunity system, a mechanistic link between periodontitis and chronic systemic disease, and elucidation of novel protein secretion systems used by periodontopathogens to secrete their virulence factors and acquire nutrients. Prof. Potempa’s research achievements are highly recognized internationally as indicated by two honorary doctorates (Dr. h.c. from the University of Lund and University of Amsterdam).