IMMUNE SYSTEM FORMATION IN CHILDREN UNDER 5 YEARS OF AGE: CLINICAL FEATURES, DEVELOPMENTAL PATTERNS AND PREVENTIVE STRATEGIES
Abstract
This study investigates the formation and maturation of the immune system in children aged 0–5 years. The research analyzes key developmental stages of both innate and adaptive immunity, identifies critical windows of immune vulnerability, and presents epidemiological data on immunodeficiency-related morbidity in Uzbekistan. The article highlights the importance of breastfeeding, vaccination schedules, and micronutrient supplementation in supporting immune ontogenesis. Results demonstrate that targeted early-life interventions can reduce infectious morbidity by up to 40%. Scientific novelty lies in the comprehensive integration of clinical, laboratory, and epidemiological data within the Central Asian pediatric context.
References
[1] Abbas, A.K., Lichtman, A.H., & Pillai, S. (2022). Cellular and Molecular Immunology (10th ed.). Elsevier. Philadelphia.
[2] WHO. (2023). Immunization Coverage: Key facts. World Health Organization. Geneva.
[3] Ministry of Health of Uzbekistan. (2023). Annual Report on Child Health Indicators. Republican Center for Disease Control, Tashkent.
[4] Adkins, B., Leclerc, C., & Marshall-Clarke, S. (2004). Neonatal adaptive immunity comes of age. Nature Reviews Immunology, 4(7), 553–564.
[5] Hanson, L.Å. (2003). Immunity to mother's milk. Nutrition, 19(9), 766–768.
[6] Victora, C.G., et al. (2016). Breastfeeding in the 21st century: epidemiology, mechanisms, and lifelong effect. The Lancet, 387(10017), 475–490.
[7] Rakhimova, Z., Nazarov, S., & Tursunova, G. (2021). Zinc deficiency and recurrent respiratory infections in Tashkent children under 5. Uzbek Medical Journal, 4(2), 88–95.
[8] Nazarov, A. & Tursunov, K. (2022). Immunization schedule adherence and herd immunity thresholds in Uzbekistan: A regional analysis. Central Asian Journal of Pediatrics, 5(1), 22–30.
[9] American Academy of Pediatrics. (2022). Policy Statement on Immunization Schedules. Pediatrics, 149(3), e2021055292.
[10] Saavedra, J.M., & Dattilo, A.M. (2012). Early development of intestinal microbiota: implications for future health. Gastroenterology Clinics of North America, 41(4), 717–731.
[11] UNICEF. (2023). State of the World's Children: For Every Child, Vaccination. UNICEF Publications. New York.
[12] Simons, R.L., & Burt, C.H. (2020). Micronutrients and immune function: a review. Journal of Nutritional Immunology, 12(1), 1–22.
[13] Uzbekistan Demographic and Health Survey (DHS). (2022). Maternal and Child Health Data. ICF International. Rockville, MD.
[14] Siegrist, C.A. (2008). Vaccine immunology. In Plotkin, S.A., et al. (Eds.), Vaccines (5th ed., pp. 17–36). Saunders.
[15] Calder, P.C. (2013). Feeding the immune system. Proceedings of the Nutrition Society, 72(3), 299–309.
