Which of the following irnmunoglobulins does constitute the largest percentage in human milk?

IgA is considered the most important immunoglobulin in breast milk. The IgA antibodies can protect the infant from a variety of illnesses including those caused by bacteria, viruses, fungi, and parasites. Besides IgA, there are four other types of immunoglobulins in breast milk. They are IgE, IgG, IgM, and IgD.