Dr O. P. Sharma is a consultant physician with special interest in Geriatrics. As a National Professor of Geriatrics and General Secretary, Geriatric Society of India, he has vast experience in organizing conferences on Geriatrics at the Regional, National and International levels. He is the Course-Director cum Editor on "PG Diploma Certificate Course on Geriatrics" of IMA AKN Sinha Institute, New Delhi and Course Writer of "PG Distance Education Course on Geriatrics" of IGNOU. He is the editor of Indian Guidelines for Vaccinations in Older Adults 2012 and Indian Recommendations for Vaccination in Older Adults 2015. He is the editor of Indian Journal of Geriatric Care. Besides being a Founder Fellow of Indian College of Physicians, Geriatric Society of India and International College of Nutrition, he is also a Fellow of IMA College of General Practitioners, IMA Academy of Medical Specialties, International Academy of Medical Specialties, Indian Academy of Clinical Medicine and Royal College of Physicians of Edinburgh. A recipient of various orations and awards, he is life member of twenty-three Scientific Associations.