Prof. Rakesh Aggarwal is a gastroenterologist–epidemiologist, who is currently working as the Director of the Jawaharlal Institute of Postgraduate Medical Education & Research (JIPMER), Puducherry, India. He previously worked for nearly 30 years at the Department of Gastroenterology at the Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow. He is well known for his studies on Liver diseases, Viral Hepatitis, in particular, Hepatitis E, and Health Economics. In addition, he is also acknowledged as an expert in the field of Vaccines and Vaccinology.