Immunosuppressed refers to a condition or state in which the immune system is weakened or suppressed, making an individual more susceptible to infections and diseases. This can occur due to various factors, such as certain medications (e.g., corticosteroids, chemotherapy drugs), medical treatments (e.g., organ transplantation), or underlying health conditions (e.g., HIV/AIDS, autoimmune disorders). When a person is immunosuppressed, their immune system is unable to function at its optimal level, leading to a reduced ability to fight off infections and other illnesses.