The Cytomegalovirus (CMV) IgM test is used to detect a recent CMV infection. A positive result indicates that the body has produced IgM antibodies in response to a CMV infection. These antibodies typically appear early in the infection and are an indicator of an active or recent exposure. CMV infection can pose serious risks, especially for individuals with weakened immune systems, such as those with HIV/AIDS or organ transplant recipients. Early detection through this test helps in managing and preventing potential complications associated with CMV infection.