Immunodeficiency, common variable, 7

This trial tests whether TAK-664, an antibody replacement given under the skin, can quickly raise and maintain protective IgG levels in people with primary immunodeficiency who have never received antibody therapy. Participants receive daily doses for 5 days, then a dose on day 8…

This study will test whether analyzing stool and urine samples using a technique called metagenomics can find infections in people with weakened immune systems (due to HIV, chemotherapy, or immunosuppressive drugs). Currently, doctors often need to take invasive samples like bloo…

This study looks at how patients with primary or secondary immunodeficiency feel about using mechanical versus electronic infusion pumps for their immunoglobulin therapy. About 52 adults who have used electronic pumps will try a mechanical pump for three months and then report th…

This study looks at children aged 6 to 8 who had a stem cell transplant at least two years ago to treat a primary immunodeficiency—a genetic condition that weakens the immune system. Researchers will use standardized tests and interviews to measure the children's thinking skills,…

This study looks back at medical records of about 60 people with primary immune deficiencies who also developed lymphoproliferative disorders (abnormal growth of immune cells). The goal is to track their health over time, including risks of death, cancer, or organ damage. By iden…

This study looks at how children aged 6 to 18 with inborn errors of immunity (a condition where the immune system doesn't work properly) feel about their quality of life. Researchers will compare their answers to those of healthy children using a special questionnaire. The goal i…