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Development of the Immune System. Early in life, the immune system is not mature enough to fight off pathogens and must depend on antibodies from the mother.

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Short version: An infant's immune system cannot be considered "mature" in any way until age three. This is why Best Practices in needle-delivered vaccinations are no needle vaccinations until age three at the earliest.

Yet the immune system is relatively immature at birth and has to evolve during a life of exposure to multiple foreign challenges through childhood, via young and mature adulthood (including pregnancy), to the decline of old age (figure 1).

Views: 61906 Date: 05.08.2019 Favorited:54
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