Lymphopenia

This study tests a tablet called PRaG-1 (made from cordycepin, a mushroom extract) in people who had solid tumors and now have low CD8+ immune cells after finishing radiation or chemotherapy at least six months ago. About 127 participants will take the tablet for two weeks, and t…

This expanded access program provides nogapendekin-alfa inbakicept (NAI) to adults with solid tumors who have low lymphocyte counts caused by prior cancer treatments like chemotherapy, immunotherapy, or radiation. The goal is to reverse and maintain healthy lymphocyte levels. It …

This study aims to collect stem cells from people with a rare condition called idiopathic CD4 lymphocytopenia (ICL) and from healthy volunteers. Participants receive two medications to move stem cells from bone marrow into the blood, where they are collected. The stem cells are t…

This study looks at how radiation treatment for esophageal cancer affects the body's ability to respond to the pneumonia vaccine. Researchers will give the vaccine to 80 patients who have low white blood cell counts after chemoradiation. They want to see if the vaccine still work…

This study looks at how iron supplements, often given for anemia, affect the immune system in people with Hereditary Haemorrhagic Telangiectasia (HHT), a rare genetic disorder that causes frequent nosebleeds and abnormal blood vessels. About 155 adults with HHT will be divided in…