You probably have an compromised immune system. You can greatly improve your immune system without drugs or strange diets. Read about that here. Immunoglobulins such as IgA1, is a fancy term for one part of the immune system.
Colostrum is mother's milk during the first few days of breastfeeding.
That is a dangerous lie. You may need what is contained within colostrum to fight every germ you ever have invade your body.