What Is Secretory IgA IgA stands for Immunoglobulin A. Our bodies contain 5 different types of immunoglobins; IgG, IgA, IgM, IgE, IgD. We have many different types of immune cells, and these are a few of them. They each have unique roles to play. IgA is the most abundant immunoglobulin in the human body. In…

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