Immunocompromised individuals have weakened or impaired immune systems, making them more susceptible to infections and diseases. This can be caused by various factors, such as medical conditions (e.g. HIV/AIDS, cancer), medications (e.g. chemotherapy, immunosuppressants), or genetic disorders. Research in the field of immunocompromised individuals focuses on understanding the mechanisms underlying immune system dysfunction, developing new treatments to boost immune function, and preventing infections in this vulnerable population. This research is crucial for improving the quality of life and outcomes for immunocompromised patients.