Dr. Sachin Kumar is currently working as Associate Professor at the Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, India. He obtained his Ph.D. in molecular virology from University of Maryland in 2010. His research area is viral Immunology, in broad sense, is the study of viral infections in context of immune responses to such infections which can cause deleterious effect on the functions of the cells. Viruses are highly adaptable and have developed ways to avoid detection by specific immune cells. Immune response to a virus follows a cascade of steps and different routes: via specific targeting cytotoxic immune cells, or chemicals such as interferon, or via antibody binding and subsequent complement system activation. Our current understanding of host immune responses to viruses has progressed in recent years, and 'Viral Immunology' as an area has established itself as a sub-discipline of 'Immunology' tackling the immunological context in viral infections.