Immunoglobulin A (IgA)
IgA Antibody
Immunoglobulin A (IgA) is an important antibody for the body's mucosal immunity, which is called the mucosal immune system. IgA is found in high concentrations in mucous membranes, such as those of the respiratory tract and gastrointestinal tract, as well as in body fluids such as saliva, tears and breast milk.