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Protecting the Newborn and Young Infant from Infectious Diseases: Lessons from Immune Ontogeny
Open accessAbstract
Infections in the first year of life are common and often severe. The newborn host demonstrates both quantitative and qualitative differences to the adult in nearly all aspects of immunity, which at least partially explain the increased susceptibility to infection. Here we discuss how differences in susceptibility to infection result not out of a state of immaturity, but rather reflect adaptation to the particular demands placed on the immune system in early life. We review the mechanisms underlying host defense in the very young, and discuss how specific developmental demands increase the risk of particular infectious diseases. In this context, we discuss how this plasticity, i.e. the capacity to adapt to demands encountered in early life, also provides the potential to leverage protection of the young against infection and disease through a number of interventions.
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“Vaccination early in life, as well as exposure to a variety of immunogens, can also affect response to pathogens and vaccines across the lifespan, sometimes in unpredictable ways.23”
From SARS-CoV-2 vaccine testing and trials in the pediatric population: biologic, ethical, research, and implementation challenges (2021) · cites this paper as [23]
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“Although neonatal vulnerability was once attributed to immune system immaturity 46,47 , a new paradigm suggests that early life is marked by active immunosuppression 37,48 .”
Sun, W., Jin, X., Li, Y., Zhou, M., Liu, X., Wang, H., Geng, H., Li, L., Hu, J., Zhou, X., et al. (2026) · BMC Medicine · doi:10.1186/s12916-026-04963-0 · Cited by 5
“Substantial evidence indicates that neonatal immune maturation is finely regulated by a variety of intrinsic and extrinsic factors [7].”
Successful treatment of infantile hepatitis B with lamivudine: A case report
Zhang, Y., Liu, J., Pan, X., Gao, Y., Hu, Y.-F., Lin, L., Cheng, H.-J., & Chen, G.-Y. (2021) · World Journal of Clinical Cases · doi:10.12998/wjcc.v9.i14.3442 · Cited by 5
Nilsson, A., Höbinger, A., Jahnmatz, P., Tiselius, E., Laestadius, Å., Melén, E., Björkander, S., & Saghafian‐Hedengren, S. (2022) · Journal of Virology · doi:10.1128/jvi.01310-22 · Cited by 5
Farsida, F., Febrianti, R., Lutfy, N., Rahmini, R., & Syahniar, R. (2023) · Jurnal Kesehatan Masyarakat · doi:10.15294/kemas.v18i3.35343 · Cited by 11
“Children aged 0-5 years are more susceptible to infection because they have immunity that has not yet functioned and developed optimally (Kollmann et al., 2017; Patra et al., 2015).”
BackgroundThe protective role of maternal genetic immunization on maternal‐fetal health and welfare
Ahmed, S., Jiang, X., Liu, G., Yang, H., Sadiq, A., Yi, D., Farooq, U., Sha, Y., & Zubair, M. (2023) · International Journal of Gynecology & Obstetrics · doi:10.1002/ijgo.14853 · Cited by 6
“126 While advancing from the second to the third trimester, rapid changes including rapid fetal development and growth, exposure to fetal antigens, and hormonal alterations, persuade the maternal immune system for prompt anti-inflammatory setting; so a more efficient response to the vaccine is…”
BackgroundMontante, S., Ben-Othman, R., Amenyogbe, N., Angelidou, A., van den Biggelaar, A. H. J., Cai, B., Chen, Y., Darboe, A., Diray‐Arce, J., Ford, R. L., et al. (2024) · Journal of Immunology Research · doi:10.1155/2024/1117796 · Cited by 4
Self-citationMiller, M. M., Barik, S., Cattin-Roy, A. N., Ukah, T., Hoeman, C. M., & Zaghouani, H. (2019) · The Journal of Immunology · doi:10.4049/jimmunol.1800943 · Cited by 5
“Finally, it remains to be seen whether probiotics and commensal TLRs (41, 42) would trigger DCs to produce sufficient IL-12 that would counter IL-13Ra1 (HR) upregulation on Th1 cells during neonatal vaccination and circumvent the IRF-1 apoptotic pathway during microbial infection.”
BackgroundReduced Steroid Metabolites Identify Infection-Prone Children in Two Independent Pre-Birth Cohorts
Prince, N., Kim, M. G., Kelly, R. S., Diray‐Arce, J., Bønnelykke, K., Chawes, B., Huang, M., Levy, O., Litonjua, A. A., Stokholm, J., et al. (2022) · Metabolites · doi:10.3390/metabo12111108 · Cited by 5
“Steroids play important roles in regulating immune response [9] and represent one pathway of interest to understand this phenomenon [10,11].”
BackgroundSelf-citationBorghesi, A. (2024) · Cellular Immunology · doi:10.1016/j.cellimm.2024.104807 · Cited by 11
Conundrums in the Management of Febrile Infants under Three Months of Age and Future Research
Wilcox, H., Umana, E., Fauteux‐Lamarre, E., Velasco, R., & Waterfield, T. (2024) · Antibiotics · doi:10.3390/antibiotics13010088 · Cited by 5
“This, in combination with the fact that infants under three months may have few clinical features of severe infection in the early stages, makes their management challenging [2,6].”
BackgroundVerhasselt, V., Marchant, A., & Kollmann, T. R. (2024) · Journal of Molecular Biology · doi:10.1016/j.jmb.2024.168718 · Cited by 6
Self-citationTumala, B., PHELPS, K., Zhang, S. Y., Bhattacharya, S., & Shornick, L. P. (2018) · Viral Immunology · doi:10.1089/vim.2018.0090 · Cited by 5
Esiaba, I., Mousselli, I., Faison, G. M., Angeles, D. M., & Boskovic, D. S. (2019) · IntechOpen eBooks · doi:10.5772/intechopen.86715 · Cited by 5
Zhou, Y., Jiang, X., Hu, Y., Zheng, Y., Yan, J., Zhang, B., Gao, Q., & Chen, Y. (2025) · Harvard Review of Psychiatry · doi:10.1097/hrp.0000000000000444 · Cited by 6
Factors influencing the efficacy of Bacille Calmette-Guérin (BCG) vaccine
Bukula, L., Chengalroyen, M. D., Omollo, C., & Moseki, R. M. (2024) · The Microbe · doi:10.1016/j.microb.2024.100230 · Cited by 4
Ocrelizumab-Induced B-Cell Depletion in a Newborn
Sacta, M. A., Jacobs, K., Sun, D. (., & Lee, J. (2025) · PEDIATRICS · doi:10.1542/peds.2025-070891 · Cited by 4
Immunology of the Fetus and Newborn
Weitkamp, J.-H., Lewis, D. B., & Levy, O. (2018) · Elsevier eBooks · doi:10.1016/b978-0-323-40139-5.00036-x · Cited by 4
Self-citationMcRae, J. E., Blyth, C. C., Cheng, A. C., Quinn, H., Wood, N. J., Macartney, K. K., & Paediatric Active Enhanced Disease Surveillance (PAEDS) and Influenza Complications Alert Network (FluCAN) Investigators (2021) · Journal of Paediatrics and Child Health · doi:10.1111/jpc.15857 · Cited by 4
Siegrist, C., & Eberhardt, C. S. (2023) · Elsevier eBooks · doi:10.1016/b978-0-323-79058-1.00002-5 · Cited by 4
Chandwani, M. N., Kamte, Y. S., Singh, V. R., Hemerson, M. E., Michaels, A. C., Leak, R. K., & O’Donnell, L. A. (2023) · Brain Behavior and Immunity · doi:10.1016/j.bbi.2023.07.008 · Cited by 4
Farrokhi, A., Atre, T., Salitra, S., Aletaha, M., Márquez, A. C., Gynn, M., Fidanza, M., Jo, S., Rolf, N., Simmons, K., et al. (2024) · Blood · doi:10.1182/blood.2024025038 · Cited by 4
Self-citationOuédraogo, L. O., Deng, L., Ouattara, C. A., Compaoré, A., Ouédraogo, M., Argaw, A., Lachat, C. K., Houpt, E. R., Saidi, Q., Haerynck, F., et al. (2024) · Nutrients · doi:10.3390/nu16234242 · Cited by 4
Protective Effect of Recombinant Proteins of Cronobacter Sakazakii During Pregnancy on the Offspring
Song, J.-R., Fu, Y.-W., Li, P., Du, T., Du, X., & Wang, S. (2020) · Frontiers in Cellular and Infection Microbiology · doi:10.3389/fcimb.2020.00015 · Cited by 4
Teixeira, F. M. E., Oliveira, L. D. M., Pietrobon, A. J., de Salles, É. M., Lima, M. R. D., Viana, I. F. T., Lins, R. D., Rigato, P. O., Marques, E. T. A., Duarte, A. J. D. S., et al. (2022) · Vaccines · doi:10.3390/vaccines10081246 · Cited by 4
“In addition, we have to consider that neonatal cells have high plasticity [2,37].”
BackgroundTorres, M. C. V., Maio, F. D., Brown, D., Spyer, M. J., Nastouli, E., Brasil, P., & de Filippis, A. M. B. (2022) · Viruses · doi:10.3390/v14092006 · Cited by 4
“Nevertheless, we hypothesized that individual evidence in NB or CSF cases could be attributable to deficiencies in the intrahost viral variants’ selection due to newborns’ immature immune responses [37] or differences between the central nervous system immunity and the peripheral one [38], respectively.”
BackgroundKono, M., Iyo, T., Murakami, D., Sakatani, H., Nanushaj, D., & Hotomi, M. (2023) · Frontiers in Cellular and Infection Microbiology · doi:10.3389/fcimb.2023.1059603 · Cited by 4
“Monocytes and macrophages are not fully mature in babies and preterm children (Kollmann et al., 2017), and studies have shown that newborn’s serum complements are lower than in adults, meaning lower host defense, opsonization level and antibody production (Yu et al.”
BackgroundYang, Z., Zhang, M., Gao, N., Peng, J., & Wei, H. (2024) · Emerging Microbes & Infections · doi:10.1080/22221751.2024.2417867 · Cited by 3
“The immune sys-tem of newborns is relatively underdeveloped, making them more vulnerable to pathogenic infections [3].”
BackgroundChildhood infectious diseases: experiences and challenges
Li, Y., Dong, X., Zheng, Q., & Li, L. (2025) · World Journal of Pediatrics · doi:10.1007/s12519-025-00941-3 · Cited by 3
“However, since the vernix mainly forms in the third trimester, pre-term infants lack this barrier, increasing their infection risk [15].”
Serious bacterial infections in infants younger than 90 days of age with acute bronchiolitis
Kim, S. K., Lee, J. Y., Han, S. B., & Lee, S. (2025) · European Journal of Pediatrics · doi:10.1007/s00431-025-06340-0 · Cited by 3
“Although infant younger than 90 days have immature immune defense [18], and thus may be more susceptible even to low-virulence organisms such as CoNS, none of the CoNS-positive infants required glycopeptide therapy, despite most isolates being methicillin-resistant.”
Chen, C., Benson, O. E., Simmons, T., Dorsett, C. L., Janczak, K. W., Wiest, M. J., Farazuddin, M., Baker, J. R., Wong, P. T., & O’Konek, J. J. (2025) · npj Vaccines · doi:10.1038/s41541-025-01227-5 · Cited by 3
“Moreover, while vaccines are administered with the greatest frequency in the fi rst year of life, the speci fi c immune effects of vaccination and adjuvants during early life have not been well de fi ned 5 .”
Biomarkers of immune dysregulation and posttreatment inflammation in spinal muscular atrophy
Jordan, S. C., Bakhtiari, M., Bhasin, S. S., Verma, S., & Bhasin, M. (2025) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.2506976122 · Cited by 3
“Neonatal T - cells are highly adaptable and, when properly primed, can mount effective immune responses ( 27 , 28 ).”
Page, C. L., Holbrook, B. C., Crofts, K. F., Alameh, M., Davis, B., Caudell, D. L., Weissman, D., & Alexander‐Miller, M. A. (2025) · npj Vaccines · doi:10.1038/s41541-025-01317-4 · Cited by 4
“It is clear that the immune system steadily evolves over the fi rst year of life 76 .”
Hong, X., Frischmeyer‐Guerrerio, P. A., Wang, G., Pearson, C., Adam, W. G., Larman, H. B., Ji, H., & Wang, X. (2025) · Precision Nutrition · doi:10.1097/pn9.0000000000000097 · Cited by 3
Metadata
- Authors
- Kollmann, T. R., Kampmann, B., Mazmanian, S. K., Marchant, A., & Levy, O.
- Affiliations
- University of British Columbia (CA)
- MRC Unit the Gambia (GM)
- California Institute of Technology (US)
- Université Libre de Bruxelles (BE)
- Boston Children's Hospital (US)
- Corresponding author
- Kollmann, Tobias R.
- Levy, Ofer
- Venue
- Immunity
- Publisher
- Elsevier BV
- Published
- 2017-03
- Volume
- 46
- Issue
- 3
- Pages
- 350-363
- ISSN
- 1074-7613 (ISSN-L)
- OpenAlex
- W2599501186
- Semantic Scholar
- e51f9b517003c880df24898208e6d4d93bb7cc87
- Cited by
- 478
- References
- 200
- Citations by year
- 2026: 62 · 2025: 45 · 2024: 54 · 2023: 51 · 2022: 40 · 2021: 67 · 2020: 69 · 2019: 39 · 2018: 36 · 2017: 15
- FWCI
- 4.45
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Immunity (publishedVersion)
- PubMed (publishedVersion)
- LSHTM Research Online (London School of Hygiene and Tropical Medicine) (acceptedVersion)
- CaltechAUTHORS (California Institute of Technology) (submittedVersion)
- Dépôt institutionnel de l'Université libre de Bruxelles (Université Libre de Bruxelles) (submittedVersion)
- Spiral (Imperial College London) (submittedVersion, cc-by-nc-nd)
- Funders
- Medical Research Council (MR/R005990/1)
- Topics
- Life Sciences › Immunology and Microbiology › Immunology › Immune responses and vaccinations
- Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Neonatal and Maternal Infections
- Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
- Keywords
- immune ontogeny, neonatal immunity, host defense, immune plasticity, neonatal infection
- MeSH terms
- Animals, Communicable Diseases, Disease Susceptibility, Humans, Immune System, Infant, Infant, Newborn
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