FAQContact UsTell A Friend
Patients & Caregivers Healthcare Professionals

What Is Primary Immunodeficiency (PID)

The human immune system acts to protect the body against infections, usually caused by germs such as bacteria and viruses. In most people, the body has a natural defense mechanism—the immune system—to fight against germs and viruses.

In persons with an immune system that is incomplete or not working correctly, this is called primary immunodeficiency (also known as PIDD, PID or PI). The most common sign of PID is an increased susceptibility to infections. These infections can be frequent, severe and sometimes hard to cure. While serious infections can occur in anyone, they tend to be much more frequent or even life-threatening in people with PID.

The immune system uses white blood cells and antibodies (called “immunoglobulin” or “Ig” for short) to fight invaders and destroy them. Many people with PID have difficulty fighting off infections, due to low levels of immunoglobulin (Ig) production. These individuals can benefit from a temporary increase in Ig. This is called “immunoglobulin replacement therapy,” or “Ig therapy.”

For those PID patients who require antibody replacement, Ig therapy is often effective. It helps boost the immune system with antibodies called immunoglobulin (Ig) that help fight off infection. Immunoglobulin is a purified solution that is removed from the blood of healthy donors and then processed.

Replacement Ig therapy is made from human plasma and is given to help prevent infections.

Next: Identifying Types of PID


CSL Behring

Important Safety Information  |   Prescribing Information  |   Contact Us  |   Site Map
Privacy Statement  |   Terms of Use  |   About CSL Behring

© CSL Behring 2010. The product information on this site is intended for US residents only.