1. Immunoglobulin Deficiencies

Immunoglobulin deficiencies are conditions where the body does not produce enough antibodies, which are proteins that help fight infections. These deficiencies can lead to increased susceptibility to illnesses, as the immune system struggles to defend against bacteria and viruses. People with these conditions may experience frequent infections, and they might need treatments like immunoglobulin replacement therapy to boost their immunity. Essentially, it's a weakness in the immune system that can affect overall health and wellbeing.