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.

1. 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)
2. 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. (Joint First Author)
3. 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.
4. 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)
5. 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. (Joint First Author)
6. 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)
7. 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.
8. 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. (Corresponding author)
9. 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
10. 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.
11. 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. (Corresponding author)
12. 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. (Corresponding author)
13. 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.
14. Reddy N. S, Sindhu KN, Ramanujam K, Bose A, Kang G, Mohan VR. Exclusive breastfeeding practices in an urban settlement of Vellore, southern India: findings from the MAL-ED birth cohort. Int Breastfeed J. 2019 Jun 27;14(1):29.
15. Bhandari N, Antony K, Balraj V, Rongsen-Chandola T, Kumar T, Sinha B, Reddy SN et al. Assessment of risk of intussusception after pilot rollout of rotavirus vaccine in the Indian public health system. Vaccine. 2020 Jun 16;
16. Choudhary TS, Reddy NS, Apte A, Sinha B, Roy S, Nair NP, et al. Delayed vaccination and its predictors among children under 2 years in India: Insights from the national family health survey–4. Vaccine. 2019 Apr 17;37(17):2331–9.
17. Shrivastava AK, Reddy NS, Giri S, Sahu PS, Das M, Mohakud NK, et al. Burden and Molecular Epidemiology of Rotavirus Causing Diarrhea among Under-Five Children: A Hospital-based Study from Eastern India. J Glob Infect Dis. 2019 Dec;11(4):147–52.
18. Nair NP, Reddy SN, Giri S, Mohan VR, Parashar U, Tate J, et al. Rotavirus vaccine impact assessment surveillance in India: protocol and methods. BMJ Open. 2019 Apr 1;9(4):e024840.
19. Reddy S, Nair NP, Giri S, Mohan VR, Tate JE, Parashar UD, et al. Safety monitoring of ROTAVAC vaccine and etiological investigation of intussusception in India: study protocol. BMC Public Health. 2018;18:898
20. Sharma SL, Reddy N S, Ramanujam K, Jennifer MS, Gunasekaran A, Rose A, et al. Unintentional injuries among children aged 1–5 years: understanding the burden, risk factors and severity in urban slums of southern India. Inj Epidemiol. 2018;5:41.
21. Ghoshal V, Nayak MK, Misra N, Kumar R, Reddy N S, Mohakud NK. Surveillance and Molecular Characterization of Rotavirus Strains Circulating in Odisha, India after Introduction of Rotavac. Indian J Pediatr. 2021 Mar 1;88(1):41–6.
22. Pradhan SK, Dash M, Ray RK, Mohakud NK, Das RR, Satpathy SK, Reddy SN et al. Childhood Intussusception after Introduction of Indigenous Rotavirus Vaccine: Hospital-Based Surveillance Study from Odisha, India. Indian J Pediatr. 2021 Mar;88(Suppl 1):112–7.
23. Badur M, Pidugu VKR, Kasala L, Samarasimha Reddy N , Thiyagarajan V. Acute Gastroenteritis in Children Below 5 Years of Age at Tirupati, Andhra Pradesh, India Post Introduction of Rotavirus Vaccine into National Immunization Programme. Indian J Pediatr. 2021 Mar;88(Suppl 1):4–9.
24. Kumar CPG, Reddy SN, Subramanian S, Shenoy A, Maniam R, Dorairaj P, et al. Epidemiology of Intussusception Hospitalizations in Children Under 2 Years of Age Post Rotavirus Vaccine Introduction in Tamil Nadu and Puducherry, India. Indian J Pediatr. 2021 Mar;88(Suppl 1):124–30.
25. Goru KB, D M, Muppidi VP, Nadipena J, Ravula M, K B, Reddy SN et al. Two-Year Prevalence of Rotavirus Among Under-Five Children Admitted with Acute Gastroenteritis in Andhra Pradesh, India. Indian J Pediatr. 2021 Mar 1;88(1):72–7.
26. Mohanty P, Kumar D, Mansingh A, Thiyagarajan V, Reddy SN, Ray RK. Rotavirus Gastroenteritis Hospitalizations Among Under-Five Children in Bhubaneswar, Odisha, India. Indian J Pediatr. 2021 Mar;88(Suppl 1):53–8.
27. Pradhan SK, Panigrahi S, Padhi PS, Sajeev A, Dharmaraj A, Reddy N S, et al. Clinical Profile, Risk-Factors, and Outcome of Rotaviral Diarrhea and Non-rotaviral Diarrhea Among Under-Five Children at Cuttack, Odisha, India. Indian J Pediatr. 2021 Mar;88(Suppl 1):84–9.
28. Ghosh S, Sarkar S, Simhareddy S, Kotne S, Rao PBA, Turlapati SPV. Clinico-morphological profile and receptor status in breast cancer patients in a South Indian Institution. Asian Pac J Cancer Prev. 2014;15:7839–42.
29. Reddy N. A Randomized Control Trial of Partial Middle Turbinate Resection in Functional Endoscopic Sinus Surgery. Indian J Public Health Res Dev. 2015;6.
30. Amarnath M, VV DP, Reddy N, Simha S. Pre-diabetes among Medical students in a Medical College, Andhra Pradesh. Indian J Public Health Res Dev. 2014;5.
31. Sree MS, Mishra S, Jena S, Patnaik S, Begum J, Reddy NSS. Study on Spiritual Dimension of Health among Medical Students in Coastal Andhra Pradesh. Int J Health Sci Res. 2014;4:16–20.
32. Lavanya S, Chandra GK, Reddy N. A Study on Role of Estrogen in Pathogenesis of Pregnancy Tumor in Andhra Pradesh. Indian J Contemp Dent. 2015;3:69–72.
33. Santosh KB, Reddy SSN. Diagnostic Nasal Endoscopic findings (DNE) of a partial middle turbinate resection in Functional Endoscopic Sinus Surgery (FESS). J Evol Med Dent Sci. 2013;2:5641–8.