Immunoglobulin is a blood product and its suitability for children depends on the indication. If the child is healthy or mildly ill, immunoglobulin is not recommended; if the child is seriously ill, immunoglobulin needs to be used scientifically under the guidance of a doctor. 1. Mildly unsuitable: for example, the child is only respiratory tract infections from time to time, or ordinary viral enteritis, often small hairy, this situation is not suitable for immunoglobulin. 2. Special diseases: such as Kawasaki disease, hemolytic anemia, severe pneumonia, etc. need to use immunoglobulin to strengthen the resistance, to help the body through the difficult times. Immunoglobulin, as a blood product, usually needs to be fed intravenously. There are strict indications for its use, and there is a certain risk of infectious diseases and allergies, and it is generally used in the treatment of serious infections or some autoimmune diseases. Immunoglobulin is a large molecule protein, which will be broken down by gastric acid and digestive enzymes in the digestive tract, thus losing its biological activity. Therefore, oral immunoglobulin does not have the effect of enhancing immunity.