Antibody also known immunoglobulin, is a protein produced by lymphoid tissue in response to the presence of a foreign substance called an antigen. Anti-Ro/SSA and Anti-La/SSB Antibodies are antibodies found in people with primary Sjogren's syndrome and other autoimmune diseases such as Lupus.

Antinuclear Antibody (ANA) is a blood test used to help evaluate a person for autoimmune disorders that affect many tissues and organs throughout the body.

Autoantibodies are antibodies (immune proteins) that mistakenly target and react with a person's own tissues or organs. One or more autoantibodies may be produced by a person's immune system when it fails to distinguish between "self" and "non-self." 

Bronchiectasis is a common lung disease characterised by chronic infection in small airways that results in some parts of the lung becoming damaged, allowing infected mucus to build up in pockets. Symptoms include a chronic cough with mucus production. Other symptoms include shortness of breathcoughing up blood, and chest pain. 

Lymphoid tissue is the part of the body's immune system important for the immune response and helps protect it from infection and foreign bodies. Lymphoid tissue is present throughout the body and includes the lymph nodes, spleen, tonsils, adenoids, and other structures. MedicineNet

NonTuberculous Mycobacteria (NTM) is a chronic lung disease
that can damage the lungs.