DR. SAMARASIMHA REDDY N

MBBS, MD, MAMS
SCIENTIST-F
CLINICAL EPIDEMIOLOGY


Email:  reddy.samarasimha@icmr.gov.in
Contact:  +91-40-27197297

Brief Profile

Dr. Samarasimha Reddy N is a physician-scientist and public health epidemiologist whose work focuses on strengthening nutrition and health systems through rigorous evidence generation and translational research. As Scientist at the ICMR-National Institute of Nutrition (NIN), Hyderabad, he leads and contributes to large-scale, policy-relevant studies that integrate clinical epidemiology, population surveillance, and implementation science to address complex nutrition and public health challenges. His research spans nutrition surveillance systems, evaluation of fortified food and welfare programs, vaccine safety and effectiveness, and maternal and child health, with an emphasis on generating actionable evidence at scale. With extensive experience working across national programs, academic institutions, and global partners, Dr. Reddy's leadership vision is to build sustainable, interoperable research platforms that accelerate evidence-to-policy pathways and support equitable, data-driven health decisions globally.

Publications: 40
  1. Chandiok K, Kothari AB, Kulkarni B, Chowdhury R, Mummadi MK, Reddy SN, et al. Public health interventions for the prevention and management of overweight and obesity in children and adolescents: a rapid review. Front Public Health. 2026;14. https://doi.org/10.3389/fpubh.2026.1893709. (Co-Author) (Impact Factor- 4.1)
  2. Mummadi MK, Gavaravarapu SM, Reddy SN, Ramanujam K, Prakash R, Vadde SR, et al. Effectiveness of dietary, physical activity, and lifestyle interventions on weight and cardiometabolic outcomes in adults with overweight or obesity: an umbrella review of 112 systematic reviews and meta-analyses from 50 countries. Obes Pillars. 2026;20:100324. https://doi.org/10.1016/j.obpill.2026.100324. (Corresponding author) (Impact Factor- 5.3)
  3. Chakraborty S, Gavaravarapu SM, Reddy SN, Kulkarni B. Ultra-processed and High fat-salt-sugar (HFSS) foods in India: a dual-axis framework for regulation. Lancet Reg Health - Southeast Asia. 2026;51. https://doi.org/10.1016/j.lansea.2026.100823. (Co-Author) (Impact Factor- 6.4)
  4. Jacob J, Reddy SN, Kaliaperumal V, Geddam JB, Rajender Rao K, Ramanujam K, et al. Gut microbial signatures across nutritional status in Indian school-aged children: a qPCR-based case-control study. Eur J Clin Nutr. 2026:1–8. https://doi.org/10.1038/s41430-026-01766-7. (Corresponding author) (Impact Factor- 4.1)
  5. Ramanujam K, Mahathi A, Pawar JN, Matla M, Ponnapalli H, Soma VK, et al. Ultra- Processed Food Consumption Patterns and Their Association with Blood Pressure Among Young Adults: A Cross-Sectional Study. Nutrients. 2026;18:1617. https://doi.org/10.3390/nu18101617. (Corresponding author) (Impact Factor- 5.1)
  6. Varghese T, Machathi A, Khakha SA, Nair NP, Samarasimha RN, Chaudhary VS, et al. Molecular epidemiology of rotavirus causing diarrhea among under-five children after the introduction of rotavirus vaccines, Rotavac and Rotasiil, into the national immunization program of India. Virol J. 2026. https://doi.org/10.1186/s12985-026-03126-0. (Impact Factor-3.8)
  7. Ramanujam K, Firdaus Z, Ponnapalli H, Perveen Z, Koralla RT, Gajjala K, et al. Interplay of diet, nutritional status, and psychological well-being in mild cognitive impairment among urban elders in Hyderabad, India: a cross-sectional study. Discov Public Health. 2026;23. https://doi.org/10.1186/s12982-026-01429-9. (Impact factor- yet to be awarded)
  8. Reddy VS, Reddy SN, Mahajan H, Ramanujam K, Reddy GB, Geddam JB, et al. Comparison of hemoglobin measurements from venous and capillary blood from the same individual using HemoCue 301 and automated hematology analyzer in a cross- sectional community-based study in India. Am J Clin Nutr. 2026;123:101119. https://doi.org/10.1016/j.ajcnut.2025.11.009. (Corresponding author)(Impact Factor-7.1)
  9. Nair NP, Reddy SN, Giri S, Thiyagarajan V, Muliyil J, Hemavathy P, et al. Impact of the indigenous rotavirus vaccine Rotavac in the Universal Immunization Program in India during 2016–2020. Nat Med. 2025;1–8. https://doi.org/10.1038/s41591-025-03998-9. (First Author) (Impact Factor-52.4)
  10. Jyoti P, Reddy NS, Rao KR, S. D. Current Approaches to Treatment of Fabry Disease. SN Compr Clin Med. 2025;7:233. https://doi.org/10.1007/s42399-025-02008-w. (Impact Factor-0.5)
  11. Ramanujam K, Thakur J, Koralla RT, Geddam JB, Reddy NS. Non-communicable diseases and risk factors profiling among geriatric population residing in Hyderabad city, India. Arch Gerontol Geriatr Plus. 2025;2:100153. (Corresponding author) (Impact Factor-0.271) 10.1016/j.aggp.2025.100153
  12. Praharaj I, Reddy SN, Nair NP, Tate JE, Giri S, Thiyagarajan V, et al. Infectious etiology of intussusception in Indian children less than 2 years old: a matched case- control analysis. Gut Pathog. 2024;16:61. 10.1186/s13099-024-00659-z. (Joint First Author)
  13. Nandeep ER, Mahajan H, Mummadi MK, Sairam C, K V, Kadiyam J, et al. Implementation, delivery, and utilization of iron fortified rice supplied through public distribution system across different states in India: An exploratory mixed-method study. PLOS Glob Public Health. 2024;4:e0003533. (Corresponding author) (Impact Factor-2.5) https://doi.org/10.1371/journal.pgph.0003533
  14. Nandeep ER, Mamidi RS, Pagidoju S, Pamidi S, Mummadi MK, Reddy G VR, et al. Comparison of Janani Suraksha Yojana (JSY) and augmented Arogya Laxmi scheme (ALS) in improving maternal and child health outcomes in urban settlements of Hyderabad, South India. BMC Pregnancy Childbirth. 2024;24:188. doi: 10.1186/s12884-024-06381-7. (Impact Factor- 3.3)
  15. Nandeep ER, Jaleel A, Reddy PB, Geddam JJB, Reddy SN, Hemalatha R. Developing and demonstrating an atomistic and holistic model of anthropometric failure among children under five years of age using the National Family Health Survey (NFHS)-5 data from India. Front Nutr. 2024;10. https://doi.org/10.3389/fnut.2023.1280219 (Corresponding author) (Impact Factor-5.1)
  16. Reddy N S, Dharmaraj A, Jacob J, Sindhu KN. Exclusive breastfeeding practices and its determinants in Indian infants: findings from the National Family Health Surveys-4 and 5. Int Breastfeed J. 2023;18:69 https://doi.org/10.1186/s13006-023-00602-z (First author) (Impact Factor-3.4)
  17. Hemalatha R, Samarasimha RN, Sairam C, Venkatesh K, Nandeep E, Teena D, et al. Efficacy and safety of Iron fortified rice in India - A white paper. 2023. https://www.nin.res.in/downloads/whitepaper.pdf
  18. Ramanujam K, Mergu N, Kondeth H, Reddy GVR, Venkata Prasad U, Sadasivuni R, Hemalatha R, Geddam Babu JJ, Reddy NS et al. Chronic Illness, Nutritional Status, and Factors Associated with Malnutrition among Various Age Groups Residing in Urban Areas of Telangana and Rural Areas of Andhra Pradesh. Nutrients. 2023;15:4470. 10.3390/nu15204470 (Corresponding author) (Impact Factor- 6.0)
  19. Pandurangi R, Mummadi MK, Challa S, Reddy NS, Kaliaperumal V, Khadar Babu C, et al. Burden and Predictors of Malnutrition Among Indian Adolescents (10–19 Years): Insights From Comprehensive National Nutrition Survey Data. Front Public Health. 2022;10:877073. https://doi.org/10.3389/fpubh.2022.877073 (Corresponding author) (Impact Factor-3.4)
  20. Reddy SN, Nair NP, Tate JE, Thiyagarajan V, Giri S, Paraharaj I, et al. Intussusception after Rotavirus Vaccine Introduction in India. N Engl J Med. 2020 Nov 12;383(20):1932–40. (First author) (Impact Factor-78.5)
Book Chapters
  1. Samarasimha RN, Nandeep ER, Monica C, Hemalatha R. Protein–Energy Malnutrition. In: Textbook of Human Nutrition. Fifth. New Delhi: CBS Publishers and Distributors Pvt Ltd; 2025. p. 234–46.
  2. Hemant M, Samarasimha RN. Research and Statistical Methods in Nutrition. In: Textbook of Human Nutrition. Fifth. New Delhi: CBS Publishers and Distributors Pvt Ltd; 2025. p. 514–37.
Conference Proceedings
  1. Organizing Secretary, INFUSE Innovation Summit 2025 (ICMR–NIN), 4–5 December 2025: Led organization of a national summit showcasing 33 shortlisted innovations (from 150+ applications) across nutrition and public health with multi- stakeholder participation and expert-led evaluation.
  2. Poster presentation titled “Malnutrition among residents of Vellore Health and Demographic surveillance system” at 67 th Annual meeting of American Society of Tropical Medicine and Hygiene at New Orleans, Louisiana, USA from October 28, 2018, to November 01, 2018.
  3. Poster presentation titled “Epidemiology of G12 rotavirus among Indian children in a multi-centric hospital-based surveillance from 2005 to 2016” at at 67 th Annual meeting of American Society of Tropical Medicine and Hygiene at New Orleans, Louisiana, USA from October 28, 2018, to November 01, 2018.
  4. Sharma SL, N SR, Ramanujam K, Jennifer MS, Gunasekaran A, Rose A, et al. PW 2288 Prevalence and risk factors of unintentional injuries among children aged 1–5 years in urban slums of Vellore, south india. Inj Prev. 2018;24 Suppl 2: A139–A139 at Bangkok, Thailand (Poster Presentation)
  5. Oral presentation titled “Coverage and timeliness of vaccines given in the universal immunization programme of India among children hospitalized for acute gastroenteritis over a period of two years (2016-2018)” at 9 th Annual research day, Centenary year of medical education at Christian Medical college, Vellore from 12-13 October 2018
  6. Samarasimha Reddy N, Aravind Dharmaraj, KN Sindhu. Effects of exclusive breastfeeding for six months compared to four months on growth and infection among Indian Children using the HBGDKi dataverse at 22 nd IUNS-International Congress of Nutrition, Tokyo, Japan from December 6-12, 2022 (Poster Presentation)
  7. Dr E R Nandeep, Dr Abdul Jaleel, Bhaskar Reddy, Dr Samarasimha Reddy N. A model to capture all forms of nutritional status among children under five years of age using the NFHS-5 data at 54 th Nutritional Society of India Annual Conference, Hyderabad, Telangana India from December 22-23, 2022 (Best poster award)
  8. Jovis Jacob, Dr. Samarasimha Reddy N, Dr. K. Venkatesh. Assessment of urinary indican in normal, underweight and obese children as an indicator of gut dysbiosis: A case-control study at 55 th Nutritional Society of India Annual Conference, Hyderabad, Telangana India from November 25-26, 2023 (Best poster award)
  9. Guest Lecture at NAAS conference 20-22 February 2025
  10. Guest lecture at 7 th IAPSM Norh east zone conference from 13-15 th February 2025
Professional Memberships
  1. Life member of Indian Public Health Association (IPHA)
  2. Life member of Indian Association of Preventive & Social Medicine (IAPSM-L-6887/2022)
  3. Life member of Nutrition Society of India (NSI-LM-2022-0079)
  4. Life Member of Epidemiology Foundation of India (03923)
  5. Member of International Epidemiological association (IEA)
  6. Member of National Academy of Medical Sciences (MAMS)
  7. Member of World Public Health Nutrition Association from 26 May 2026
  8. Member of International Society of Behavioral Nutrition and Physical Activity (ISBNPA)
Awards and Honors
  1. Awarded Membership of the National Academy of Medical Sciences (India) (MAMS) at the NAMSCON 2025 Convocation, held at PGIMER, Chandigarh, on November 8, 2025.
  2. Best Poster award at 54th Nutritional Society of India Annual Conference, Hyderabad, Telangana India from December 22-23, 2022 Dr E R Nandeep, Dr Abdul Jaleel, Bhaskar Reddy, Dr Samarasimha Reddy N. A model to capture all forms of nutritional status among children under five years of age using the NFHS-5 data.
  3. Best poster award at 55th Nutritional Society of India Annual Conference, Hyderabad, Telangana India from November 25-26, 2023. Jovis Jacob, Dr. Samarasimha Reddy N, Dr. K. Venkatesh. Assessment of urinary indican in normal, underweight and obese children as an indicator of gut dysbiosis: A case-control study.
  4. ICMR- Travel grant for attending the WHO and Cornell Cochrane review training at Cornell university, Ithaca, New York, USA in 15-21 July 2023.