Injections to enhance human immunity mainly include thymus peptide injection, recombinant human interferon a-2b injection, transfer factor injection, etc. The side effects of different injections are different and cannot be generalized. 1. Thymopeptide injection: Thymopeptide injection has the function of enhancing the immunity of human cells, and it can be used in the treatment of chronic hepatitis and AIDS, as well as the treatment of tumors in clinic, but this kind of drug may lead to serious allergic reactions, such as urticaria. 2. Recombinant human interferon a-2b injection: recombinant human interferon injection can enhance the immunity of human body, in the clinic can be used for the treatment of hepatitis B, hepatitis C, malignant melanoma, in the clinic, the adverse reactions mainly include fever, leukopenia, anorexia and so on. 3. Transfer Factor Injection: Transfer Factor Injection is mainly used in the adjuvant treatment of herpes zoster or malignant tumors in clinic, which has relatively fewer side effects, and may lead to redness, swelling or pain at the injection site. It is recommended to use such drugs under the guidance of a professional doctor, do not self-medicate.