Dr. Tabll has a good experience in establishment of cell lines producing of mouse monoclonal antibodies for immunodiagnosis by hybridoma technology and establishment of human cell lines producing of human monoclonal antibodies for immunotherapy by EBV immortalization of B lymphocytes. In the last 10 years, research of Dr. Tabll is was focusing on hepatitis C virus (HCV), production and studying of neutralizing mouse / human monoclonal antibodies against conserved regions from HCV and also in the production of HCV vaccine. Dr. Tabll is experienced in flow cytometric analysis (cell cycle analysis and immunphenotyping, intracellular staining) and he was an operator for Facscalibure,BD, Epics profill II flow cytometers). Publications of Dr. Tabll are focused on viral hepatitis (HBV and HCV) and liver diseases (liver cirrhosis and hepatocellular carcinoma). His phD in biochemistry was from Cairo University, Egypt 2001. Dr. Tabll started his carrier as a researcher   in National Research Center, Egypt 2003 and associate professor position 2008 and professor position of Medical Biotechnology at 2013. Dr. Tabll travelled as post doc to Connecticut health center, Farmington, USA in Lab. of Prof. G. Wu 2006 and to Yale University, New Haven, USA in lab. of Prof. Yorgo Modis 2013/2014 as a visiting professor. Also he had a scholarship funded by DAAD as post doc to virology Institute, Essen, Germany, lab. of Dr. Sergie Viazov at 2010. Dr. Tabll presented his research data in several international workshopes and conferences in France, UK, Italy, Germany, Turky, Croatia, Japan and Mixco. Dr. Tabll was awarded the Encourage Prize State (Egypt) in biological sciences 2004. Dr. Tabll published more than 50 international articles.