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Representative Immune Factors in Human Milk the Production of Which Is Delayed in the Recipient Infant
| Agents | Time of Maturation |
|---|---|
| Secretory IgA | ∼4–12 mo |
| Full antibody repertoire | ∼2 yr |
| Memory T cells | ∼2 yr |
| Lysozyme | ∼1–2 yr |
| Lactoferrin | ? |
| Interferon-γ | ? |
| Interleukin-6 | ? |
| Interleukin-8 | ? |
| Interleukin-10 | ? |
| TNF-α | ? |
| PAF-acetylhydrolase | ? |
PAF-AH = platelet activating factor-acetylhydrolase; TNF-α = tumor necrosis factor-α
