A nurse is teaching parents about the importance of immunizations for infants because of immaturity of the immune system. The parents demonstrate that they understand the teaching if they make which statement?
a. "The spleen reaches full size by 1 year of age.".
b. "IgM, IgE, and IgD levels are high at birth.".
c. "IgG levels in the newborn infant are low at birth.".
d. "Absolute lymphocyte counts reach a peak during the first year.".
D
Absolute lymphocyte counts reach a peak during the first year. The spleen reaches its full size during adulthood. IgM, IgE, and IgD are normally in low concentration at birth. IgM, IgE, IgA, and IgD do not cross the placenta. The term newborn infant receives an adult level of IgG as a result of transplacental transfer from the mother.
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