Explore the complexities of managing infections in immunocompromised patients, excluding HIV cases, in this 39-minute lecture by Dr. Ian Blyth from The Royal College of Pathologists. Delve into disease and therapy-mediated immunosuppression, examining the fundamental principles of a functioning immune system and how they can be altered. Understand the impact of immunosuppression on infection risk, with a focus on CMV, PCP, and invasive pulmonary aspergillosis. Learn how immunosuppression affects diagnostic algorithms, prophylaxis strategies, and empiric antimicrobial therapy approaches, equipping healthcare professionals with essential knowledge for treating this vulnerable patient population.