Professor Sergey L. Mukomolov MD, PhD, DSc is the Head of Epidemiology department and Viral hepatitis Laboratory in Saint-Petersburg Pasteur Institute. He is also a professor in Tropical Medicine department at North-Western State medical university named after I.I.Mechnikov. He started his professional career in 1981 after graduating from Leningrad (now Saint-Petersburg, Russia) medical university. His first PhD thesis (1984) was focused on clinical and epidemiological features of chronic Hepatitis B virus carriers; second one (1994) discussed the acute and chronic Hepatitis C viral infection. Now professor Mukomolov is one of the leading researchers in the field of diagnostics, epidemiology and prevention of viral hepatitis in the Russian Federation. He is the author of 230 publications and inventor of 7 patents. The results of his most important studies were published in well known journals like Journal of Viral Hepatitis, Journal of Virology, Journal of Medical Virology and many others.