MICROANATOMY

Detailed explanation-1: -Immunoglobulin A (IgA): It’s found in the linings of the respiratory tract and digestive system, as well as in saliva (spit), tears, and breast milk.

Detailed explanation-2: -IgG Antibodies in Breast Milk Help Shape Infants’ Gut Bacteria and Immunity. Researchers have known for some time that maternal breast milk provides critical nutrients for newborns, and antibodies from mothers vaccinated against a specific disease-causing bacterium or virus can be transferred via breast milk to babies.

Detailed explanation-3: -These maternal milk antibodies include IgA, IgG and IgM isotypes as well as the secretory forms of IgA and IgM. Although all three major classes of immunoglobulins are present in human colostrum and milk, only IgA and IgM are locally produced in the human mammary gland.