Diagnosis of CVID in children typically involves a combination of clinical evaluation and laboratory tests. Doctors will assess the patient’s medical history, focusing on the frequency and severity of infections. Blood tests are conducted to measure levels of immunoglobulins (IgG, IgA, and IgM). A diagnosis of CVID is considered when these levels are significantly low. Additional tests may include specific antibody responses to vaccines and other functional tests of the immune system.
