Colostrum, the yellowish fluid, secreted by the mother during the initial days of lactation is very essential to impart immunity to newborn infants because it contains:
Immunoglobulin A
Natural killer cells
Monocytes
Macrophages
the yellowish fluid called colostrum secreted by the mother during the initial days of lactation has abundant antibodies (IgA) to protect the infant This is a crucial example of passive immunity transferred from mother to child.
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