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Related Concept Videos

Vaccinations01:51

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Development of Immunocompetence01:22

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The initiation of cell-mediated immunity can be observed as early as the third month of fetal growth, with active antibody-mediated immunity following approximately one month later.
The initial cells that migrate from the fetal thymus settle within the skin and epithelial tissues lining the mouth, digestive tract, and in females, the uterus and vagina. These cells, including skin-based dendritic cells, serve as antigen-presenting cells, playing a key role in T cell activation.
Subsequent T...
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Rethinking Neonatal Vaccination Policies: A Neuroimmune Perspective.

Zeinab Paymani1, Mostafa Nazari1, Kayvan Mirnia2

  • 1Department of Nuclear Medicine, Children Medical Center Hospital, Tehran University of Medical Sciences, Tehran, Iran.

Iranian Journal of Medical Sciences
|February 26, 2026
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This summary is machine-generated.

Neonatal vaccination

Keywords:
Autoimmune diseasesBirth dose vaccineEpigeneticsNervous system diseasesVaccine

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Area of Science:

  • Neuroimmunology
  • Developmental neuroscience
  • Vaccinology

Background:

  • Neonatal vaccination is crucial for preventing early-life infections.
  • The timing and safety of infant immunizations warrant careful evaluation.
  • The developing immune and nervous systems interact during early life.

Purpose of the Study:

  • To explore the neuroimmune effects of early-life immunization.
  • To examine how vaccine-induced immune responses may influence brain development.
  • To address concerns linking early vaccination to neurodevelopmental disorders.

Main Methods:

  • Literature review focusing on neuroimmune implications of neonatal vaccination.
  • Analysis of potential mechanisms: epigenetic modifications, cytokine responses (IL-6).
  • Examination of concerns: immune overstimulation, T-cell regulation, microbiome disruption.

Main Results:

  • Vaccine-induced immune activation may impact brain development via epigenetic changes and sustained IL-6 responses.
  • Potential links exist between immune dysregulation (overstimulation, T-cell suppression, microbiome changes) and autoimmune/neurodevelopmental disorders.
  • Significant evidence gaps remain regarding the long-term neurodevelopmental impact of neonatal vaccines.

Conclusions:

  • A cautious, individualized vaccination strategy is recommended.
  • The "As Low and Late As Reasonably Achievable" (ALLARA) principle balances protection with neurological health.
  • Further research is needed to fully understand and mitigate potential neurodevelopmental risks associated with early immunization.