The main reliable drugs to improve immunity are carboxymethyl amylose sodium solution and panflora bacterial lysis product capsule, etc. Carboxymethyl amylose sodium solution can be taken for a long time to improve immunity and reduce recurrent upper respiratory tract infections and asthma caused by recurrent respiratory tract infections, and panflora bacterial lysis product capsule is an immunomodulatory drug that can enhance immunity by stimulating the body’s immune system. It can enhance immunity by stimulating the immune system. Zinc Gluconate Oral Solution can be used as a zinc supplement to treat immune deficiency caused by zinc deficiency. Vitamin A deficiency can also lead to decreased immunity and can be supplemented prophylactically to improve immunity. Human immunoglobulin is an antibody substance extracted from healthy human bodies. Intravenous infusion can improve immune deficiency or recurrent infections caused by poor resistance for a short period of time, but it has many side effects and is generally not recommended. The best way to boost resistance is to get vaccinated, unless immunodeficiency is not suitable for vaccination, you should actively vaccinate your child with class I and class II vaccines to reduce the chance of disease, pidomod was widely used before, but now it is not recommended for young children.