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How can immunoglobulin treatment help people with immune deficiencies?

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immune system disorder False-color scanning electron micrograph of a T cell infected with HIV (human immunodeficiency virus), the agent that causes AIDS (acquired immunodeficiency syndrome).

Immunoglobulin treatment, often administered as intravenous immunoglobulin (IVIG), serves as a vital therapy for individuals with immune system disorders characterized by immune deficiencies.12

For patients with B-cell deficiencies who are unable to produce their own antibodies, this treatment provides passive immunity by supplying preformed antibodies—primarily IgG—derived from the pooled blood plasma of thousands of healthy donors. By introducing these antibodies directly into the recipient's bloodstream, the treatment helps the body protect itself against various bacteria and viruses, thereby reducing the severity and frequency of infections.123

Because the recipient's body slowly breaks down these human-derived antibodies over several weeks, the therapy offers temporary but effective protection. Furthermore, intravenous administration is often preferred over intramuscular injections as it provides immediate antibody levels and avoids the discomfort associated with traditional injection methods.32