Prof. Aggarwal is Director and Professor of Gastroenterology at Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India. Before this, he worked for 28 years at Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India, where he headed a WHO Collaborating Center on Viral Hepatitis, and was engaged in teaching, clinical care of patients with liver disease, and research on viral hepatitis. He has undertaken several epidemiologic, molecular and immunologic studies on hepatitis E, and has written several reviews on this disease. He has also undertaken studies on hepatitis B and C, including on cost-effectiveness of various therapeutic and prevention strategies.
He is also a member of the WHO’s Strategic Advisory Group of Experts on Immunization (SAGE) and chairs the WHO SAGE’s Working Group on Hepatitis A Vaccines.