What is Secondary Immunodeficiency?

The immune system keeps the body healthy by fighting off germs. But sometimes, due to external factors (those not caused by genetics) people develop what’s known as a secondary immunodeficiency (SID). Just like with a primary immunodeficiency, the outcome can be life marked by seemingly never-ending infections and colds that just don’t go away. As a result, people may face repeated rounds of antibiotics and hospitalization for treatment. SID is much more common than primary (genetic) immunodeficiencies.