Overheard medical student talking with pediatrician in the hall. what is iga deficiency?

Antibody deficiency: Immunogobulin a is a type of immune system protein called an antibody. Iga lines the mucus membranes of the respiratory tract and other areas and helps fight off infections there. Iga deficiency is the most common antibody deficiency and can result in increased infections, particularly in the respiratory tract.

Immunodeficiency: Iga immunodeficiency is the most common form of immunodeficiency. Iga is a blood product that is found in the mucous that lines our noses, sinuses and other areas of our body. It can be considered a first line of defense. Generally these patients do very well but can have recurrent sinus infections and can dev other immunodef. Iga def pt are a risk for bad rxn to blood products.